OLD Measurement Instructions

Mark Bottom Width 20″ from Left Side

By Doug, the Screen Guy | Published October 22, 2010 | Full size is 1873 × 1378 pixels

Mark Bottom Width 20" from Left Side

Measure Top Width from Mark to Right Side Measure Bottom Width from Mark to Right Side

Repeat the same procedure for the bottom measurement.

On the left side, at the bottom, make a mark at 20 inches – as shown in the picture to the left.

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