Is there a way to loop several patterns or always start from a particular pattern and continue on to the end when Start is pressed? From the documentation, seems that only one pattern can be looped.
do that from the Pattern Matrix. see the little rectangular blocks in between the play-button and the yellow number? you can click+drag on those to activate multiple, and Renoise will loop that section.
“Using the column to the immediate left of the pattern numbers, you can cause a pattern or sequence of patterns to loop. Left-click and drag in this column to indicate the patterns you want to loop. To remove a loop just click on a single slot twice.”