I think I understand where your confusion may be coming from as it seems you may be expecting "BPM" to be visually displayed. The arranger window's job is to provide a grid view of the meter (3/4 in this case). Tempo is a totally different thing which the arranger window has nothing to do with. So while it's correct to speak of tempo as "beats per minute", those "beats" have no business being represented in the arranger window.
Edit: Read your comment again and just picked up on what you said about having changed it through Piano Roll rather than the Sequencer. Yea, I wouldn't know what to expect here (though I'd' think it would/should sync). Anyway, I disable that toolbar in my Piano Roll as it always struck me as completely redundant.
I think I understand where your confusion may be coming from as it seems you may be expecting "BPM" to be visually displayed. The arranger window's job is to provide a grid view of the meter (3/4 in this case). Tempo is a totally different thing which the arranger window has nothing to do with. So while it's correct to speak of tempo as "beats per minute", those "beats" have no business being represented in the arranger window.
Edit: Read your comment again and just picked up on what you said about having changed it through Piano Roll rather than the Sequencer. Yea, I wouldn't know what to expect here (though I'd' think it would/should sync). Anyway, I disable that toolbar in my Piano Roll as it always struck me as completely redundant.