RE: Spacing between two sections of the same staff and custom bar numbers

[James Lowe]

Olexa,

I cannot answer your first question but to your second.
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2. How to order Lilypond to draw bar numbers below the staff and at specific 
locations, and to box a subset of them and place them above the staff instead. 
I suspect I need a function that takes in the bar number and prints out yes or 
no according to the value. In C, this would look something like

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Can you not simply use something as indicated here

http://lilypond.org/doc/v2.13/Documentation/notation/bars#index-rehearsal-mark-style

Just choose what number you want to put in your 'box'.

James