I can’t select more than 1 album to play?
Album view. Select first, long touch on the first then select more then select play.
I’ve wasn’t aware of that, will have to give it a try. I usually add the ones I want to hear to the queue then start playback, or queue others after playback has started.
What is the equivalent action to long touching if I’m using a mouse?
Right click then add more with last clicks
Or Right Mouse then Shift and Left Mouse to highlight a span of albums , often useful if you need to Merge albums into say a box set
I can long ‘touch’ with my mouse (Mac) exactly as I do on the iPad - just click and hold and it functions the same way.