diff --git a/docs/home/themes.md b/docs/home/themes.md
index 796c4f0..80dfa9c 100644
--- a/docs/home/themes.md
+++ b/docs/home/themes.md
@@ -9,7 +9,7 @@ Mr fsenthusiast has not only created a couple of **different themes** for *swift
 
 ## Download & Generate Themes
 
-Download a ready to use theme or create a custom style sheet: **[fsenthusiast swift Style Sheet Generator](http://fsenthusiast.net/swift/themes.php)**
+Download a ready to use theme or create a custom style sheet: **[fsenthusiast swift Style Sheet Generator](https://fsenthusiast.com/swift/index.php)**
 
 
 ![](./../img/themes_01.jpg){: style="width:32%"}
diff --git a/docs/troubleshooting/faq/choosing_callsign.md b/docs/troubleshooting/faq/choosing_callsign.md
deleted file mode 100644
index 47c7982..0000000
--- a/docs/troubleshooting/faq/choosing_callsign.md
+++ /dev/null
@@ -1,6 +0,0 @@
-<!--
-    SPDX-FileCopyrightText: Copyright (C) swift Project Community / Contributors
-    SPDX-License-Identifier: GFDL-1.3-only
--->
-
-For VATSIM see also <https://www.vatsim.net/pilot-resource-centre/general-lessons/choosing-callsign>.
diff --git a/docs/troubleshooting/faq/fly_copilot.md b/docs/troubleshooting/faq/fly_copilot.md
deleted file mode 100644
index 3533449..0000000
--- a/docs/troubleshooting/faq/fly_copilot.md
+++ /dev/null
@@ -1,6 +0,0 @@
-<!--
-    SPDX-FileCopyrightText: Copyright (C) swift Project Community / Contributors
-    SPDX-License-Identifier: GFDL-1.3-only
--->
-
-See [Shared cockpit](./../../documentation/flying/shared_cockpit.md).
diff --git a/docs/troubleshooting/faq/restrict_rendered_aircrafts.md b/docs/troubleshooting/faq/restrict_rendered_aircrafts.md
deleted file mode 100644
index 45f5be2..0000000
--- a/docs/troubleshooting/faq/restrict_rendered_aircrafts.md
+++ /dev/null
@@ -1,6 +0,0 @@
-<!--
-    SPDX-FileCopyrightText: Copyright (C) swift Project Community / Contributors
-    SPDX-License-Identifier: GFDL-1.3-only
--->
-
-See [Aircraft range](./../../documentation/flying/settings/range.md)
diff --git a/docs/troubleshooting/ui_concepts.md b/docs/troubleshooting/ui_concepts.md
index b19105e..be84661 100644
--- a/docs/troubleshooting/ui_concepts.md
+++ b/docs/troubleshooting/ui_concepts.md
@@ -34,7 +34,7 @@ Just place your pointer of a field or label.
 
 Use `CTRL +`, `CTRL -` or `CTRL 0` to increase, decrease or reset font size.
 
-Resize views
+## Resize views
 
 - Use `CTRL R`
 - Use the resize features from the context menu, try what works best for you
diff --git a/mkdocs.yml b/mkdocs.yml
index 667c286..68d3c7a 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -158,12 +158,9 @@ nav:
     - Troubleshoot voice: troubleshooting/voice.md
     - Linux Hotkeys are not detected: troubleshooting/linux_hotkeys.md
     - Questions and answers (aka FAQs):
-      - Choosing a callsign: troubleshooting/faq/choosing_callsign.md
-      - How to fly as co-pilot?: troubleshooting/faq/fly_copilot.md
       - Models not accessible: troubleshooting/faq/model_not_accessable.md
       - I do not see other planes, no other aircraft, no other traffic: troubleshooting/faq/xp_problems.md
       - I see no other traffic: troubleshooting/faq/no_traffic.md
-      - How can I restrict the number of aircraft?: troubleshooting/faq/restrict_rendered_aircrafts.md
       - X-Plane landing gear missing/no animations:
         - troubleshooting/faq/xp_landing_gear/index.md
         - Deactivate plugins with xOrganizer: troubleshooting/faq/xp_landing_gear/deactivate_plugins_xorganizer.md