How can I access all the characters on a Chromebook keyboard?

Question

I can't seem to be able to access the blue characters on my Chromebook keyboard.

Technical info about the Chromebook I am using:

Google Chrome 121.0.6167.9 (Official Build) dev (64-bit) Revision 9a74004e5ee81bd2e17f315d14be3089b0d40be0-refs/branch-heads/6167@{#55} Platform 15699.5.0 (Official Build) dev-channel grunt Firmware Version Google_Grunt.11031.169.0 Customization ID careena ARC 11153516 SDK Version: 30 JavaScript V8 12.1.285.2 User Agent Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

I've tried all kinds of Ctrl, Alt, Alt gr and Shift combinations but I can't access them.

Thanks for the help!