diff --git a/README.md b/README.md
index b0e5c7b..7c414b8 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,8 @@ space: mark file
 a: mark all files in directory
 d: trash
 
+[1-9]: favourites/bookmarks (see customizing)
+
 ?: show help
 q: exit with last dir written to file
 ctrl+c exit without writing last dir
@@ -91,7 +93,6 @@ b: bulk rename
 
 p: execute paste/move/delete/bulk_rename
 
-[1-9]: favourites/bookmarks (see customization)
 ```
 
 # Dependencies
@@ -115,6 +116,19 @@ c() {
     cd "$(cat "${XDG_CACHE_HOME:=${HOME}/.cache}/ccc/.ccc_d")"
 }
 ```
+## Environment variables
+```sh
+export CCC_LAST_D=~/.cache/ccc/.ccc_d
+export CCC_FAV1=~/projects
+export CCC_FAV2=~/.bashrc
+export CCC_FAV3=~/Pictures/Wallpapers/
+export CCC_FAV4=/usr/share
+export CCC_FAV5=/
+export CCC_FAV6=
+export CCC_FAV7=
+export CCC_FAV8=
+export CCC_FAV9=
+```
 ## Using `ccc` in neovim as a file picker
 See [ccc.nvim](https://github.com/night0721/ccc.nvim)
 
diff --git a/ccc.1 b/ccc.1
index 9b2aac1..060e446 100644
--- a/ccc.1
+++ b/ccc.1
@@ -66,5 +66,38 @@ ctrl+c exit without writing last dir
 .nf
 
 Various settings can be changed in config.h file located in the program's directory.
+
+.
+.fi
+.
+.SH "CD on Exit for POSIX Shell"
+.
+.nf
+
+# Add this to your .bashrc, .zshrc or equivalent.
+# Run 'ccc' with 'c' or whatever you decide to name the function.
+c() {
+    ccc "$@"
+    cd "$(cat "${XDG_CACHE_HOME:=${HOME}/.cache}/ccc/.ccc_d")"
+}
+
+.
+.fi
+.
+.SH "Environment variables"
+.
+.nf
+
+export CCC_LAST_D=~/.cache/ccc/.ccc_d
+export CCC_FAV1=~/projects
+export CCC_FAV2=~/.bashrc
+export CCC_FAV3=~/Pictures/Wallpapers/
+export CCC_FAV4=/usr/share
+export CCC_FAV5=/
+export CCC_FAV6=
+export CCC_FAV7=
+export CCC_FAV8=
+export CCC_FAV9=
+
 .
 .fi
diff --git a/ccc.c b/ccc.c
index fd20f10..9330009 100644
--- a/ccc.c
+++ b/ccc.c
@@ -372,6 +372,18 @@ int main(int argc, char **argv)
 				show_history();
 				break;
 
+			case '1': case '2': case '3': case '4': case '5': case '6': case '7':
+			case '8': case '9':
+				char envname[9];
+				snprintf(envname, 9, "CCC_FAV%d", ch - '0');
+				char *fav = getenv(envname);
+				if (fav && !strcmp(fav, "")) {
+					char dir[PATH_MAX];
+					strcpy(dir, fav);
+					change_dir(dir, 0, 0);
+				}
+				break;
+
 			/* mark one file */
 			case SPACE:
 				add_file_stat(files->items[sel_file].name, files->items[sel_file].path, 1);