diff --git a/Cargo.lock b/Cargo.lock
index 3f9d224c..9696cc68 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -416,9 +416,9 @@ dependencies = [
 
 [[package]]
 name = "bstr"
-version = "1.7.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c79ad7fb2dd38f3dabd76b09c6a5a20c038fc0213ef1e9afd30eb777f120f019"
+checksum = "542f33a8835a0884b006a0c3df3dadd99c0c3f296ed26c2fdc8028e01ad6230c"
 dependencies = [
  "memchr",
  "serde",
@@ -3515,9 +3515,9 @@ checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
 [[package]]
 name = "self_cell"
-version = "1.0.1"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c309e515543e67811222dbc9e3dd7e1056279b782e1dacffe4242b718734fb6"
+checksum = "e388332cd64eb80cd595a00941baf513caffae8dce9cfd0467fc9c66397dade6"
 
 [[package]]
 name = "semver"
@@ -3670,9 +3670,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.11.1"
+version = "1.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "942b4a808e05215192e39f4ab80813e599068285906cc91aa64f923db842bd5a"
+checksum = "4dccd0940a2dcdf68d092b8cbab7dc0ad8fa938bf95787e1b916b0e3d0e8e970"
 
 [[package]]
 name = "socket2"
@@ -4026,7 +4026,7 @@ dependencies = [
 
 [[package]]
 name = "tpnote"
-version = "1.22.13"
+version = "1.23.0"
 dependencies = [
  "arboard",
  "directories",
@@ -4049,7 +4049,7 @@ dependencies = [
  "thiserror",
  "time",
  "toml 0.8.8",
- "tpnote-lib",
+ "tpnote-lib 0.30.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "webbrowser",
  "win32job",
  "windows-sys 0.48.0",
@@ -4086,6 +4086,38 @@ dependencies = [
  "windows-sys 0.48.0",
 ]
 
+[[package]]
+name = "tpnote-lib"
+version = "0.30.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24ee1d427130fc51900e146094f2704958686026e75af7b775af99616248ac8b"
+dependencies = [
+ "html-escape",
+ "latex2mathml",
+ "lazy_static",
+ "lingua",
+ "log",
+ "parking_lot",
+ "parse-hyperlinks",
+ "parse-hyperlinks-extras",
+ "percent-encoding",
+ "pulldown-cmark",
+ "rst_parser",
+ "rst_renderer",
+ "sanitize-filename-reader-friendly",
+ "self_cell",
+ "serde",
+ "serde_json",
+ "serde_yaml",
+ "substring",
+ "syntect",
+ "tera",
+ "thiserror",
+ "toml 0.8.8",
+ "win32job",
+ "windows-sys 0.48.0",
+]
+
 [[package]]
 name = "tracing"
 version = "0.1.40"
diff --git a/Cargo.toml b/Cargo.toml
index ebe63f3e..767f76d9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,7 +15,7 @@ license = "MIT/Apache-2.0"
 readme = "README.md"
 repository = "https://gitlab.com/getreu/tp-note"
 rust-version = "1.70.0"
-version = "1.22.13"
+version = "1.23.0"
 
 [profile.release]
 strip = "symbols"
diff --git a/docs/build/man/man1/tpnote.1 b/docs/build/man/man1/tpnote.1
index 17e7db87..de1f40a3 100644
--- a/docs/build/man/man1/tpnote.1
+++ b/docs/build/man/man1/tpnote.1
@@ -15,7 +15,7 @@
 . ftr VB CB
 . ftr VBI CBI
 .\}
-.TH "TP-NOTE" "1" "2023-11-08" "Version 1.22.13" "Tp-Note documentation"
+.TH "TP-NOTE" "1" "2023-11-12" "Version 1.23.0" "Tp-Note documentation"
 .hy
 .SH NAME
 .PP
@@ -616,8 +616,8 @@ be available or work as expected.
 .RE
 .RS
 .PP
-Use `\f[V]-b -d trace\f[R]' for debugging templates and configuration
-files.
+Use `\f[V]-b -d trace\f[R]' for debugging templates and
+`\f[V]-V -b -d trace\f[R]' for debugging configuration files.
 If the HTTP server (viewer) does not work as expected:
 `\f[V]-n -d debug\f[R]'.
 If your text editor does not open as expected:
@@ -804,6 +804,8 @@ As most users do not expect the viewed file to change,
 Print Tp-Note\[cq]s version, its built-in features and the path to the
 sourced configuration file.
 The output is YAML formatted for further automatic processing.
+In addition, use `\f[V]-V -b -d trace\f[R]' for configuration file
+debugging.
 .RE
 .PP
 \f[B]-x\f[R] \f[I]DIRECTORY\f[R], \f[B]--export\f[R]=\f[I]DIRECTORY\f[R]
@@ -1533,10 +1535,12 @@ into the default configuration.
 Then the resulting syntax is checked.
 If not correct, the last sourced configuration file is renamed (thus
 disabled) and Tp-Note starts with its internal default configuration.
+For debugging, you can print out the merge result with
+`\f[V]-V -b -d trace\f[R]'.
 .PP
 To write a custom configuration file, first start with a complete
 default configuration you can generate by invoking Tp-Note with
-`\f[V]-V -b -c\f[R]'.
+`\f[V]-V -b -c\f[R]' (no `\f[V]-d\f[R]').
 .IP
 .nf
 \f[C]
@@ -1675,6 +1679,7 @@ Consider the following example:
 .IP
 .nf
 \f[C]
+[app_args]
 windows.editor = [
     [
     \[aq]{{ get_env(name=\[dq]LOCALAPPDATA\[dq]) }}\[rs]Programs\[rs]Microsoft VS Code\[rs]Code.exe\[aq],
@@ -1691,6 +1696,7 @@ Windows for a user with the username `\f[V]Joe\f[R]' to
 .IP
 .nf
 \f[C]
+[app_args]
 windows.editor = [
     [
     \[aq]C:\[rs]User\[rs]Joe\[rs]AppData\[rs]Local\[rs]Programs\[rs]Microsoft VS Code\[rs]Code.exe\[aq],
@@ -1952,6 +1958,8 @@ extensions, that are regarded as Markdown files:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.filename]
 extensions = [
   [ \[dq]txt\[dq], \[dq]Markdown\[dq] ],
@@ -1968,16 +1976,20 @@ The default file extension for new note files is defined as:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.filename]
 extension_default = \[aq]md\[aq]
 \f[R]
 .fi
 .PP
 If you prefer rather the file extension `\f[V].markdown\f[R]' for new
-notes, change this to:
+notes, write a configuration file with:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.filename]
 extension_default = \[aq]markdown\[aq]
 \f[R]
@@ -2005,6 +2017,8 @@ candidates, e.g.:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.tmpl]
 filter.get_lang = [
     \[aq]en\[aq],
@@ -2028,6 +2042,8 @@ for \[lq]add all languages\[rq]:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.tmpl]
 filter.get_lang = [
     \[aq]+all\[aq],
@@ -2052,6 +2068,8 @@ The corresponding configuration looks like this:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.tmpl]
 filter.map_lang = [
     [
@@ -2145,6 +2163,8 @@ Consider the following simplified example:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 fm_vars.localization = [
     [\[dq]fm_title\[dq], \[dq]title\[dq]],
     [\[dq]fm_subtitle\[dq], \[dq]subtitle\[dq]],
@@ -2161,6 +2181,8 @@ Example:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 fm_vars.localization = [
     [\[dq]fm_title\[dq], \[dq]Titel\[dq]],
     [\[dq]fm_subtitle\[dq], \[dq]Untertitel\[dq]],
@@ -2196,20 +2218,24 @@ There is one little exception though.
 The following configuration variables affect the way new notes are
 created:
 .IP "1." 3
-Change the default file extension for new notes from:
+The file extension for new notes is defined as:
 .RS 4
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.filename]
 extension_default=\[aq]md\[aq]
 \f[R]
 .fi
 .PP
-to:
+Overwrite this setting with the configuration file:
 .IP
 .nf
 \f[C]
+[[scheme]]
+name = \[dq]default\[dq]
 [scheme.filename]
 extension_default=\[aq]rst\[aq]
 \f[R]
@@ -2545,7 +2571,8 @@ the text source with clickable hyperlinks:
 .IP
 .nf
 \f[C]
-[viewer_error]
+[tmpl_html]
+viewer_error = \[aq]\[aq]\[aq]
 <!DOCTYPE html>
 <html lang=\[rs]\[dq]en\[rs]\[dq]>
 <head>
diff --git a/docs/source/tpnote--manpage.md b/docs/source/tpnote--manpage.md
index 6e05277a..af3e395b 100644
--- a/docs/source/tpnote--manpage.md
+++ b/docs/source/tpnote--manpage.md
@@ -1,10 +1,10 @@
 ---
-title:      TP-NOTE(1) Version 1.22.13 | Tp-Note documentation
+title:      TP-NOTE(1) Version 1.23.0 | Tp-Note documentation
 subtitle:   manpage
 author:     Jens Getreu
-version:    1.22.13
+version:    1.23.0
 filename_sync: false
-date:       2023-11-08
+date:       2023-11-12
 lang:       en-GB
 ---
 
diff --git a/docs/source/tpnote--manual.md b/docs/source/tpnote--manual.md
index a71f3139..a9b086c6 100644
--- a/docs/source/tpnote--manual.md
+++ b/docs/source/tpnote--manual.md
@@ -2,8 +2,8 @@
 title:    "Tp-Note: save and edit your clipboard content as a note file"
 subtitle: Organize your notes with your favourite editor and markup language
 author:   Jens Getreu
-date:     2023-11-08
-version:  1.22.13
+date:     2023-11-12
+version:  1.23.0
 filename_sync: false
 lang:     en-GB
 ---
diff --git a/tpnote-lib/Cargo.toml b/tpnote-lib/Cargo.toml
index 1236aa5c..95ab1fe8 100644
--- a/tpnote-lib/Cargo.toml
+++ b/tpnote-lib/Cargo.toml
@@ -39,7 +39,7 @@ rst_parser = { version = "0.4.0", optional = true }
 # ReStructuredText renderer.
 rst_renderer = { version = "0.4.0", optional = true }
 sanitize-filename-reader-friendly.workspace = true
-self_cell = "1.0.1"
+self_cell = "1.0.2"
 serde_json = "1.0.108"
 serde.workspace = true
 serde_yaml.workspace = true
diff --git a/tpnote/Cargo.toml b/tpnote/Cargo.toml
index adadadf8..fcb78b45 100644
--- a/tpnote/Cargo.toml
+++ b/tpnote/Cargo.toml
@@ -94,8 +94,8 @@ thiserror.workspace = true
 time = "0.3.30"
 tera.workspace = true
 toml.workspace = true
-tpnote-lib = { path = "../tpnote-lib", default-features = false }
-# tpnote-lib = { version = "0.30.4", default-features = false}
+# tpnote-lib = { path = "../tpnote-lib", default-features = false }
+tpnote-lib = { version = "0.30.4", default-features = false}
 webbrowser = { version = "0.8.12", optional = true }
 
 [target.'cfg(windows)'.dependencies]