How to change firefox developer edition inspector background colour - firefox-developer-edition

Just started using Firefox Developer Edition and the background colour in Inspector was a lovely black background. Now it's changed to a white colour. Any idea how I can change it back?
I'm on an Apple Mac OS Sierra 10.12.6 and using Firefox Dev Ed 58.0b1
Thanks,
Djuro

doh! there it is in the settings wheel for the inspector element.
inspector setting screenshot

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Background color of tabbar and alert messages are bright yellow after xcode update

I updated my xcode to 12.3 and it changed the background colors to bright yellow on Navigation Tab bar and alertviews.
I have them set to default colors and that appears to be light grey. The text and images remain black but I noticed that one of the images has gone to full color. Very weird.
Also the background color of the entire simulator, even the App Settings page, has turned bright yellow. I can change colors in the inspector panel (though the text tint does not change, always white) and it changes it on the xib screen but the simulator still shows the bright yellow background with the correct blue if selected and dark gray if not selected images and text.
The change effected every tab bar in the app. When run on actual device, the colors are normal. Translucent is checked. When unchecked the background color appears white.
Anyone give me advice on what to do here?
I ran into the same issue after install xcode 12.3. This is how to fix the issue.
Certain parts of the screen appear yellow in Interface Builder and the simulator.
First do this...
Open your Simulator and go to File > GPU Selection > Prefer Integrated GPU in
Then do this...
Quit Xcode and simulator
Unplug power cable
Restart Xcode and simulator
Check storyboard or simulator to confirm yellow tint is gone
Reconnect in power cable
Worked for me. Good luck
MacOS had an update and after I installed that, the colors reverted to normal.

SwiftUI: The Structured Editing Popover (Command + Click) does not show up

In SwiftUI tutorial (link) it says to:
Command-click the text view’s initializer to show the structured editing popover, and then choose Embed in VStack
However, it does not work for me.
What is the command for that?
What that deprecated already?
If it helps someone out there, you must have changed Xcode shortcut preferences to go to "Definition" on "Command Click".
So now for seeing the structured editing popover, use "Control Command Click".
Seems to be an Xcode quirk caused by having the canvas hidden. Bring the preview canvas back on screen and the Command + Click functionality returns to normal:
I've seen similar weirdness with two Xcode windows open… especially if one window is hiding the Preview.
Another quirk mentioned above: the Library picker is missing the Views and Modifiers tab sometimes. Again, open the Preview Canvas and the Library will snap back to normal. You might also have to bring focus to the canvas (i.e. click on something there).
Close and reopen Xcode should help. Like code completion sometimes is not working the popover also sometimes stuck.
I found that command + Left Click on Text (within the .swift file) took me to the definition of Text, however command + Right Click caused the menu containing "everything" to appear, from which I was then able to select "Show in UISwift inspector".
I couldn't get anything to popup in the Canvas.
Using Xcode 12.2 on macOS 11.0.1
According to Apple's release notes for the latest Xcode 11 beta release, the inspector and preview features don't currently work without MacOS Catalina 10.15 (the current stable/public release is MacOS 10.14.6 at the time of posting).
You'll either need to wait until the publicly released version of Mac OS 10.15 or gain access to a beta version of MacOS to use these.
Source (Apple | Xcode 11 Release notes):
Xcode 11 supports development with SwiftUI. (22843503)
Note: SwiftUI previews and inspectors are only available when running on macOS Catalina 10.15.
Restart the project for 1 or 2 times and CMD+B(Build) your project one the start.

Zoom out in Xcode Storyboard Preview Mode with Keyboard

While applying AutoLayout I have switched to Preview Mode On so Preview window is showing my design in iPhone 8,iPhone SE and iPad devices like this
now I want to zoom out so that no need to scroll Preview window Left and Right.
Pinch Zoom In/Out is available in MacBooks but i need it for mac mini
Any help would be Appreciated.
You have to double click in the white space area.

How do you print Xcode Swift source code in color?

I am using Xcode 8.3.3 and Swift 4 on macOS Sierra 10.12.6. My printer is the HP Color Officejet Pro 8620. When I attempt to print from Xcode menu File>Print, I un-check the Black & White in the print dialog-box; however, it still prints the source code in black and white.
My printer prints correctly in color in other applications such as Mac's TextEdit, etc. (but not in Xcode).
I greatly appreciate it if anyone has a solution or recommendation for this. Thanks.
When the print dialog sheet appears, try selecting the default or basic theme.

Xcode - Dark theme for the whole UI

How can one make Xcode's UI completely dark?
There must be a way to have a dark theme for Xcode (like Visual Studio has it for example). I'm not only talking about a way of styling the editor, but a full-on dark theme. Dark menus, dark console, dark file browser, dark menu bar, etc.
Xcode's bright UI hurts at night and I can't be the only one who's really searching for this ;) (please don't recommand f.lux to me now, that's not a solution)
Xcode's UI can be changed to completely dark with Xcode 10 running on macOS Mojave. Just go into System Preferences -> General -> Under Appearance -> Click the dark mode
You can reference to this article:
https://medium.com/#guilhermerambo/how-to-enable-real-dark-mode-on-os-x-macos-14966f9f7d24
Install a dark mode in system service,it make Xcode most control dark,it's not perfect, but works.
Hope Apple implement it someday.
In Preferences → Accessibility there is a checkbox Invert colors. Of course, it doesn't give a nice dark theme, but I found it quite useful when working in darkness. The whole system interface with this checkbox on looks funny.
System wide dark mode is announced in macOS 10.14 Mojave in WWDC 18. You can also enable dark mode for XCode 10. Dark mode in interface builder.
Here is the link for XCode 10 beta
In Xcode 9 or below you can include the last the theme Dark,
https://gist.github.com/andresilvagomez/94854ed5320fac2b3b5790e63efc516e
Execute this command
open ~/Library/Developer/Xcode/UserData/FontAndColorThemes/
and create this file there
Default (Dark).xccolortheme
and paste the content inside of URL
Don't think Xcode can do that. You might want to consider the excellent Appcode IDE though.
If you need Dark theme for the whole UI, Here is how you what you can do:
1: Open Xcode settigns
2: Click Appearance and select Dark
Done!
This works in Xcode 9:
Xcode --> Preferences.. --> Fonts & Colors tab --> Choose your them (Dusk / Midnight)

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