diff --git a/Annex/AdjustedBranch.hs b/Annex/AdjustedBranch.hs
index bdac72bbeb..a23b70154e 100644
--- a/Annex/AdjustedBranch.hs
+++ b/Annex/AdjustedBranch.hs
@@ -240,12 +240,21 @@ originalBranch = fmap fromAdjustedBranch <$> inRepo Git.Branch.current
  - branch).
  -
  - Can fail, if no branch is checked out, or if the adjusted branch already
- - exists, or perhaps if staged changes conflict with the adjusted branch.
+ - exists, or if staged changes prevent a checkout.
  -}
 enterAdjustedBranch :: Adjustment -> Annex Bool
-enterAdjustedBranch adj = go =<< originalBranch
+enterAdjustedBranch adj = inRepo Git.Branch.current >>= \case
+	Just currbranch -> case getAdjustment currbranch of
+		Just curradj | curradj == adj ->
+			reenterAdjustedBranch adj currbranch
+				(fromAdjustedBranch currbranch)
+		_ -> go currbranch
+	Nothing -> do
+		warning "not on any branch!"
+		return False
   where
-	go (Just origbranch) = do
+	go currbranch = do
+		let origbranch = fromAdjustedBranch currbranch
 		let adjbranch = adjBranch $ originalToAdjusted origbranch adj
 		ifM (inRepo (Git.Ref.exists adjbranch) <&&> (not <$> Annex.getState Annex.force))
 			( do
@@ -263,17 +272,52 @@ enterAdjustedBranch adj = go =<< originalBranch
 					]
 				return False
 			, do
-				AdjBranch b <- preventCommits $ const $ 
+				b <- preventCommits $ const $ 
 					adjustBranch adj origbranch
-				showOutput -- checkout can have output in large repos
-				inRepo $ Git.Command.runBool
-					[ Param "checkout"
-					, Param $ fromRef $ Git.Ref.base b
-					]
+				checkoutAdjustedBranch b []
 			)
-	go Nothing = do
-		warning "not on any branch!"
-		return False
+
+checkoutAdjustedBranch :: AdjBranch -> [CommandParam] -> Annex Bool
+checkoutAdjustedBranch (AdjBranch b) checkoutparams = do
+	showOutput -- checkout can have output in large repos
+	inRepo $ Git.Command.runBool $
+		[ Param "checkout"
+		, Param $ fromRef $ Git.Ref.base b
+		-- always show checkout progress, even if --quiet is used
+		-- to suppress other messages
+		, Param "--progress"
+		] ++ checkoutparams
+
+{- Already in a branch with this adjustment, but the user asked to enter it
+ - again. This should have the same result as checking out the original branch,
+ - deleting and rebuilding the adjusted branch, and then checking it out.
+ - But, it can be implemented more efficiently than that.
+ -}
+reenterAdjustedBranch :: Adjustment -> Branch -> OrigBranch -> Annex Bool
+reenterAdjustedBranch adj@(PresenceAdjustment _ _) currbranch origbranch = do
+	b <- preventCommits $ \commitlck -> do
+		-- Avoid losing any commits that the adjusted branch has that
+		-- have not yet been propigated back to the origbranch.
+		_ <- propigateAdjustedCommits' origbranch adj commitlck
+
+		-- Git normally won't do anything when asked to check out the
+		-- currently checked out branch, even when its ref has
+		-- changed. Work around this by writing a raw sha to .git/HEAD.
+		inRepo (Git.Ref.sha currbranch) >>= \case
+			Just headsha -> inRepo $ \r ->
+				writeFile (Git.Ref.headFile r) (fromRef headsha)
+			_ -> noop
+	
+		adjustBranch adj origbranch
+	
+	-- Make git checkout quiet to avoid warnings about disconnected
+	-- branch tips being lost.
+	checkoutAdjustedBranch b [Param "--quiet"]
+reenterAdjustedBranch adj@(LinkAdjustment _) _ origbranch = preventCommits $ \commitlck -> do
+	-- Not really needed here, but done for consistency.
+	_ <- propigateAdjustedCommits' origbranch adj commitlck
+	-- No need to do anything else, because link adjustments are stable.
+	return True
 
 adjustToCrippledFileSystem :: Annex ()
 adjustToCrippledFileSystem = do
diff --git a/CHANGELOG b/CHANGELOG
index f0021ee1bc..7d4a46604a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,5 +1,11 @@
 git-annex (6.20181012) UNRELEASED; urgency=medium
 
+  * At long last there's a way to hide annexed files whose content
+    is missing from the working tree: git-annex adjust --hide-missing
+  * When already in an adjusted branch, running git-annex adjust
+    again will update the branch as needed. This is mostly
+    useful with --hide-missing to hide/unhide files after their content
+    has been dropped or received.
   * Removed the old Android app.
   * Removed support for building with very old ghc < 8.0.1,
     and with yesod < 1.4.3, and without concurrent-output,
diff --git a/Command/Adjust.hs b/Command/Adjust.hs
index b2956cbc4d..9f9e6153e5 100644
--- a/Command/Adjust.hs
+++ b/Command/Adjust.hs
@@ -1,6 +1,6 @@
 {- git-annex command
  -
- - Copyright 2016 Joey Hess <id@joeyh.name>
+ - Copyright 2016-2018 Joey Hess <id@joeyh.name>
  -
  - Licensed under the GNU GPL version 3 or higher.
  -}
@@ -16,21 +16,30 @@ cmd = notBareRepo $ notDirect $ noDaemonRunning $
 		paramNothing (seek <$$> optParser)
 
 optParser :: CmdParamsDesc -> Parser Adjustment
-optParser _ = 
-	flag' (LinkAdjustment UnlockAdjustment)
+optParser _ =
+	(LinkAdjustment <$> linkAdjustmentParser)
+	<|> (PresenceAdjustment <$> presenceAdjustmentParser <*> maybeLinkAdjustmentParser)
+
+linkAdjustmentParser :: Parser LinkAdjustment
+linkAdjustmentParser =
+	flag' UnlockAdjustment
 		( long "unlock"
 		<> help "unlock annexed files"
 		)
-	<|> flag' (LinkAdjustment FixAdjustment)
+	<|> flag' FixAdjustment
 		( long "fix"
 		<> help "fix symlinks to annnexed files"
 		)
-	{- Not ready yet
-	<|> flag' (PresenseAdjustment HideMissingAdjustment)
+
+maybeLinkAdjustmentParser :: Parser (Maybe LinkAdjustment)
+maybeLinkAdjustmentParser = Just <$> linkAdjustmentParser <|> pure Nothing
+
+presenceAdjustmentParser :: Parser PresenceAdjustment
+presenceAdjustmentParser =
+	flag' HideMissingAdjustment
 		( long "hide-missing"
-		<> help "omit annexed files whose content is not present"
+		<> help "hide annexed files whose content is not present"
 		)
-	-}
 
 seek :: Adjustment -> CommandSeek
 seek = commandAction . start
diff --git a/doc/forum/How_do_I_hide_files_not_present_in_the_local_annex__63__/comment_5_1ed5e10e51078a0aa7e6968ef48687a3._comment b/doc/forum/How_do_I_hide_files_not_present_in_the_local_annex__63__/comment_5_1ed5e10e51078a0aa7e6968ef48687a3._comment
new file mode 100644
index 0000000000..bf55735a57
--- /dev/null
+++ b/doc/forum/How_do_I_hide_files_not_present_in_the_local_annex__63__/comment_5_1ed5e10e51078a0aa7e6968ef48687a3._comment
@@ -0,0 +1,10 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 5"""
+ date="2018-10-18T18:59:54Z"
+ content="""
+Good news everyone! `git annex adjust --hide-missing` sets up a branch
+where only files with content available are included. And once in such a
+branch, `git annex sync` updates it as necessary to reflect changes in
+content availability.
+"""]]
diff --git a/doc/forum/How_to_hide_broken_symlinks/comment_5_1ed5e10e51078a0aa7e6968ef48687a3._comment b/doc/forum/How_to_hide_broken_symlinks/comment_5_1ed5e10e51078a0aa7e6968ef48687a3._comment
new file mode 100644
index 0000000000..bf55735a57
--- /dev/null
+++ b/doc/forum/How_to_hide_broken_symlinks/comment_5_1ed5e10e51078a0aa7e6968ef48687a3._comment
@@ -0,0 +1,10 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 5"""
+ date="2018-10-18T18:59:54Z"
+ content="""
+Good news everyone! `git annex adjust --hide-missing` sets up a branch
+where only files with content available are included. And once in such a
+branch, `git annex sync` updates it as necessary to reflect changes in
+content availability.
+"""]]
diff --git a/doc/git-annex-adjust.mdwn b/doc/git-annex-adjust.mdwn
index 6f32f30298..07319f7f17 100644
--- a/doc/git-annex-adjust.mdwn
+++ b/doc/git-annex-adjust.mdwn
@@ -4,7 +4,7 @@ git-annex adjust - enter an adjusted branch
 
 # SYNOPSIS
 
-git annex adjust `--unlock|--fix`
+git annex adjust `--unlock|--fix|--hide-missing [--unlock|--fix]`
 
 # DESCRIPTION
 
@@ -20,9 +20,14 @@ While in the adjusted branch, you can use git-annex and git commands as
 usual. Any commits that you make will initially only be made to the
 adjusted branch. 
 
-To propagate changes from the adjusted branch back to the original branch,
+To propagate commits from the adjusted branch back to the original branch,
 and to other repositories, as well as to merge in changes from other
-repositories, use `git annex sync`.
+repositories, run `git annex sync`.
+
+Re-running this command with the same options
+while inside the adjusted branch will update the adjusted branch
+as necessary (eg for `--hide-missing`), and will also propagate commits
+back to the original branch.
 
 This command can only be used in a v6 git-annex repository.
 
@@ -40,6 +45,22 @@ This command can only be used in a v6 git-annex repository.
   unusual way that prevents the symlinks committed to git from pointing at
   the annex objects.
 
+* `--hide-missing`
+
+  Only include annexed files in the adjusted branch when their content
+  is present.
+
+  The adjusted branch is not immediately changed when content availability
+  changes, so if you `git annex drop` files, they will become broken
+  links in the usual way. And when files that were missing are copied into the
+  repository from elsewhere, they won't immediatly become visible in the
+  branch. 
+  
+  To update the adjusted branch to reflect changes to content availability, 
+  run `git annex adjust --hide-missing` again.
+
+  This option can be combined with --unlock or --fix.
+
 # SEE ALSO
 
 [[git-annex]](1)
diff --git a/doc/todo/hide_missing_files/comment_4_e3bf8aaecc0f612873609c92814dcd12._comment b/doc/todo/hide_missing_files/comment_4_e3bf8aaecc0f612873609c92814dcd12._comment
new file mode 100644
index 0000000000..279d0557d7
--- /dev/null
+++ b/doc/todo/hide_missing_files/comment_4_e3bf8aaecc0f612873609c92814dcd12._comment
@@ -0,0 +1,25 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 4"""
+ date="2018-10-18T19:27:43Z"
+ content="""
+I implemented `git annex adjust --hide-missing`.
+It can be run after any change to content availability to update
+the adjusted branch, hiding or unhiding files.
+
+My implementation is not as fast as it could be; each update
+is a linear scan of the whole original branch and rebuild of the adjusted
+branch. But it all works so we'll defer speeding this up to later bug
+reports about it being too slow. ;)
+
+What still needs to be done:
+
+* `git annex sync --content` needs to scan the original branch, not the
+  adjusted branch, to find files to transfer.
+* `git annex sync` needs to update the adjusted branch.
+* The assistant also needs to scan the original branch when looking for
+  files to download.
+* The assistant ought to update the adjusted branch at some point after
+  downloads, but it's not clear when. Perhaps this will need to be deferred
+  until it can be done more cheaply, so it can do it after every file.
+"""]]