Is it possible to create a highlight mode for the cursor so that it highlights anytime it is clicked? I highlight books a lot and it would be good to take it from a 2-step process (make the selection and then click the highlight) to a 1-step process.
Adobe Acrobat allows you to do this for PDFs. You can also just double-click a word to highlight it (in highlight mode). Double-clicking in Logos opens the lookup window, so I am not sure this is possible.