Texpad iOS works well with external keyboards. Ordinarily these are bluetooth keyboards, for example those that come with an iPad pro, however Texpad will work with any keyboard setup with iOS.

The CMD-Keys mapped for use with Texpad iOS are

• CMD-T Press this to start typeset
• CMD-D Pressing this will sync the pdf to the current editor position
• CMD-1 Show/hide outline
• CMD-2 Show the editor pane only
• CMD-3 Show Editor/PDF split panes
• CMD-4 Show the PDF pane only
• CMD-8 Show the Typeset issues dropdown
• CMD-9 Show the Typeset log dropdown

These are chosen to be compatible with Texpad macOS