SummaGram creates keyboards by assigning characters to keyboard keys. Keyboards are saved within the app for quick access. The keyboards can be shared with other users.
The app default keyboard was designed for ease of use by placing punctuation near the alpha and number clusters. Most punctuation characters are on single keys, no upper case.
Also a space block, cut/copy/paste and cursor navigation arrow clusters.
Keyboards can be assigned to instant keys T1-T10. They are called "Toggle" boards. These can be extended languages, personal emojis, phrases, formulas and beyond that you create.