Specifies the size of the enclosure for instrument text.
You can select 1 through 4 characters on each of the two available lines within an instrument balloon, or you can specify no balloon.
Click Show 
to display a gallery of shapes, and then select the appropriate setting.
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No Balloon suppresses plotting of a balloon around the instrument name.
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1 Character plots a balloon size at least 1 character on each line.
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2 Character plots a balloon size at least 2 character on each line.
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3 Character plots a balloon size at least 3 character on each line.
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4 Character plots a balloon size at least 4 character on each line.
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5 Character plots a balloon size at least 5 character on each line.
Defines:
Option Switch - 123, Pos 1
I-Configure - Drawing.Format.InstIDEnclosureSize
This property is not applicable for Smart 3D cabletray isometric drawings.