please increase multi samples window
or plase add option to show more than 2 lines
You can click and drag the line that separates the instruments section and the samples section.
It’s already possible:
http://tutorials.renoise.com/wiki/Instrument_Selector
Please carefully read through the manual first. If for some reason you can’t find your answer there, then post a question in the Beginners forum to ask for help from other users.
It’s polite to do a little bit of research first before asking for new features 
May I direct you to this thread …scroll down 