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By default, the size of tiles is  proportional to  the video resolutionthe surveillance windows on the layout is proportional to the resolution of the video image.
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To fix the size and expand tiles to all free space on the layout area, do as followsFor the surveillance windows to be of a fixed size and occupy the entire area of the layout, do the following:

1. Go to Settings → Options → User interface Options (1) → User Interface (1–2). 
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2. Clear the Uncheck the Adjust video frame border checkbox  checkbox (34).Image Removed
3. Click Apply to save the changesClick the Apply button.
4. Reopen the Layout layout (see see Layouts Management).

The video will retain its Configuring the surveillance windows is complete. The surveillance windows are of a fixed size and occupy the entire area of the layout. The video images keep their aspect ratio.
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To expand the video image to all the entire surveillance window, do as followsthe following:

1. Uncheck the Clear the Keep aspect ratio checkbox (3).
2. Click Apply to save the changesClick the Apply button.
3. Reopen the Layout layout (see see Layouts Management).

Configuring the surveillance windows is complete. The video image is expanded to the entire surveillance window.
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