For the Big Piano window...

In the pdf manual for BIAB 2014, the Big Piano window listed as being under the 'Window' menu. This menu is at the very top, above the track names (Piano, Bass, Drums... etc.). Again according to the manual, the short cut keys are CTRL+SHFT+N

For the harmony being added....

I'm not sure about this but it sounds like you might have accidentally activated the Real Time Harmony feature. This is found under the 'Harmony' menu (beside the 'Window' menu). The image below is taken from BIAB 2016 but it is similar in BIAB 2014.



Make sure that #1 above is set to 'no harmony' and #2 is active so that harmony doesn't occur all the time.

In case you wish to look this up, information about the 'Harmony' menu is found on page 570 of the pdf manual for BIAB 2014.

Regards,
Noel


MY SONGS...
Audiophile BIAB 2025