Keyboard Installed; but Special Diacritics Don't Show Up

Hey guys, I am new to Keyman Desktop. I want to type diacritic fonts for romanized Sanskrit text. I’ve downloaded the appropriate keyboards - Hindi (Indic Roman Transliteration SIL) as well as Hindi (Hi-Newa-IN) and installed them. When I open the on screen keyboard, only English letters are visible - no sanskrit diacritics appear. What am I missing here?

For the Indic Roman Transliteration (SIL) keyboard you can look at the documentation for help: This indicates that you can type the “modifier” first and then the letter. So, ^a would give you â.

I’m not sure which keyboard you are referencing for Hindi with the Newa script. It should hopefully have a similar help file. There are two Newa script keyboards: