We’re sorry that the documentation has not yet been updated. But we are making solid progress on fleshing out the documentation. Our focus at the moment is on expanding the section of the documentation called ‘Notation reference’, which explains how each of the various notational features of the application are input and edited (this includes tremolos, of course). Once that section is more or less complete we expect to publish a big update with all of that material. Then our attention will turn to documenting Play mode, which is currently pretty much completely undocumented, and then go back over the other modes to ensure that their documentation is fully in line with the current state of the program.