While these adjustments may improve readability of a document, they may end up increasing the number of systems required. You can lock measures into a particular system, which is especially useful when you’re fine-tuning a piece’s layout: avoiding an awkward page turn, forcing a key change to fall at the beginning of a system, and so on.
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The tighter the music, the more measures will fit on a line, and hence the more music will fit on the page. You can control the “tightness” of the spacing of the music itself with the Music Spacing command in conjunction with a Spacing Width library. It’s important to realize that there are several elements affecting the amount of music on a page: Horizontal layout Once your overall page layout is defined, you can easily make formatting changes with the Page Layout tool, such as specifying how much music should fit on a page-how many measures per line, for example, or how many systems on a page. Fortunately, it's easy to apply the changes to existing pages. Changes you make to the page layout definition in these dialog boxes, however, don’t immediately affect existing pages-only pages yet to be created. The initial layout of any document’s pages is determined by this definition. This definition is controlled for the score in the Page Format for Score dialog box and for linked parts in the Page Format for Parts dialog box.
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While you can control these settings on a staff-by-staff or system-by-system basis, it is recommended to define a page format that applies to the majority of the document prior to making these individual edits. Page layout depends on many elements and settings in your document. Noteman says: See Working with staves and systems for a step-by-step tutorial overview of page layout.