Is the dark theme toggle not visible for you? Here's how to fix it

Posted by on in Blogs

In RAD Studio 10.2.2, we introduced a new dark IDE theme.  I'll write more about this in detail later this week.

We've seen initial bug reports affecting users upgrading from an existing 10.2.x installation that the toolbar button allowing you to toggle between the light and dark themes isn't visible.  There are two workarounds:

  1. Change theme through the Options dialog: Tools > Options > Theme Manager
  2. Use the below fix to make the button visible

Making the toolbar button visible

Toolbar settings are saved in the registry, and this includes the width of the toolbar. Adding a new button to the toolbar changes the width, but the toolbar will not expand when loading pre-10.2.2 saved layouts.

The easiest way to solve this is to edit the registry to delete the value for the desktop layout toolbar. When the IDE next opens, it will show the toolbar's full width.


Editing values in the registry is risky. Don't do this unless you are familiar with the registry.

  1. Close the IDE
  2. Open RegEdit, and navigate to HKEY_CURRENT_USER\Software\Embarcadero\BDS\19.0\Toolbars
  3. Find the DesktopToolbar value
  4. Delete it
  5. Reopen the IDE

You will see the Desktop Layout toolbar now shows the Theme toolbar button.

Gold User, No rank,
C++ Product Manager, looking after C++Builder as well as the IDE.


  • Steve J
    Steve J Wednesday, 13 December 2017

    And what about remembering the IDE layout?
    No matter what I do it reverts back to "Startup Layout", which I don't use (looks more and more like a Confluence or Stack Exchange web page rather than a real application IDE)???
    I work in Classic Undocked, but if I close one file, then everything switches back to Startup Layout.

  • David Millington
    David Millington Thursday, 14 December 2017

    You can edit the Startup Layout - go to the default layout and then click the Save button and overwrite the Startup layout. It shows whenever there are no files or projects open.

  • Clinton J
    Clinton J Wednesday, 13 December 2017

    Wouldn't it be even easier if they updated the customize toolbars dialog so we could just drop the combobox onto whatever toolbar we wanted? I can not seem to find it anywhere in the list.

    Might be a good area to focus on next for IDE improvements!

  • David Millington
    David Millington Thursday, 14 December 2017

    Yes, it should be there, we'll look at that.

  • Navid M585
    Navid M585 Wednesday, 13 December 2017

    For me it was easier to fix by right-clicking the toolbars: -> Customize -> select the Desktop toolbar and reset it.

  • David Millington
    David Millington Thursday, 14 December 2017

    Thanks, that's a good way.

  • Robert Evans
    Robert Evans Wednesday, 13 December 2017

    Another way, that worked for me, is to click 'View' / 'Toolbars' / 'Customise...', then select 'Desktop' in the Customise window and click the 'Reset' button.

  • David Millington
    David Millington Thursday, 14 December 2017

    Thankyou, that's a good way to do it.

  • Rohit Kamat
    Rohit Kamat Wednesday, 13 December 2017

    Thanks, David - I came here looking to see if anyone else had the same issue :)

    There is another issue with the Documentation tab not displaying properly (but it has already been logged in QP)...


  • David Millington
    David Millington Thursday, 14 December 2017

    That will be fixed soon :)

  • Please login first in order for you to submit comments
  • Page :
  • 1

Check out more tips and tricks in this development video: