controlling number of bars in a line

[Jay Hamilton]

I'm feeling really stupid because I can't find this information (and I 
know it's there) in the manuals either online or in the pdfs.
basically just want to hold the bars to 6 per line and yes I know I can 
do this manually but would like to see the appearance if done 
automatically.
Thanks in advance I'm sure this is easily found but I couldn't
version 2.18.2

Jay

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