[gimp-web/testing] Update userfaq.md

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 9363851f55ba6d47b654e2ae83f46b14fd9f514a
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Thu Sep 12 10:22:41 2019 +0000

    Update userfaq.md

 content/docs/userfaq.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)
---
diff --git a/content/docs/userfaq.md b/content/docs/userfaq.md
index 3ddba80d..005aea78 100644
--- a/content/docs/userfaq.md
+++ b/content/docs/userfaq.md
@@ -157,6 +157,18 @@ Apple's Terms of Service. For a full story, please read
 by Richard Gaywood.
 
 ## Features
+### I do not recognize GIMP's user interface. It's different from what I seee in all tutorials. What do I do?
+
+We switched to a dark user interface theme and a symbolic icon theme by default
+in version 2.10. If you absolutely want to revert it, here is what you do:
+
+Go to `Edit > Preferences > Interface > Theme` and change the them from _Dark_
+to _System_.
+
+Then go to `Edit > Preferences > Interface > Icon Theme` and change the theme
+from _Symbolic_ to _Legacy_.
+
+Changes will apply immediately. Click _OK_ to confirm.
 
 ### When will GIMP support HDR imaging and processing with 16bit per color channel precision?