If you are writing more than one language on your computer or typewriter, you might want to see also foreign language characters on your keyboard. You can use for this JL-types' keyboard sticker set, which contains 119 stickers (basic Latin, Finnish/Swedish, Russian, Baltic characters, punctuation marks, numbers, and special characters) or 224 stickers for all European languages using Latin, Cyrillic or Greek alphabet, e.g. for Greek, Ukrainian and Turkish. Keyboard stickers are included to all JL-types' foreign language typefaces packages.
You can download keyboard sticker installation instructions in English, Russian, Estonian, Latvian, and Lithunian here.
N.B.! White stickers are not anymore available from 04/2020!
The orange red stickers are clearly visible on both ordinary light, dark and grey keyboards and also black keyboards on many laptop computers. The sticker size is 5,5 mm x 6 mm. This means, that stickers and the original characters on keycaps are both visible.
In the picture you can see a fragment of the sticker sheet (these are transparent; the black backgroud is only for reference).