Select an image, click the Fill color button and fill the background color.

Select an image, click the line color button to fill its line color.

Select an image, click on the line Weight button to change the line thickness.

The Grid lines and Show Ruler option is checked, the workspace will display the network and scale.

Click to Zoom in to enlarge the workspace, click the Zoom out work area can be reduced, 100% button can be scaled to the normal proportion of the work area, while the percentage of the pages can also be scaled..