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. You create your own default keyboard.
Also are a space, cut/copy/paste and cursor navigation arrow clusters.
Extra keyboards can be assigned to instant keys T1-T10. These can be extended languages, personal emojis, phrases, formulas and beyond that you create.
Details on website SummaGram.tech