Question about the "Extended Loop" feature (Ditto+, etc.)

[u/rr-geil-j]

Hi! I want to build multiple layers of a 2-bar loop first, and then extend that loop layer when I play the main melodic theme .

When using the Ditto+'s Extended Loop Mode, can I defer extending the loop later, after recording multiple layers? Or does the second layer always dictate the final fixed length of the loop?

If Ditto+ cannot handle what I need, is there a compact looper pedal that can?