Customizing image tile border:

1. Click on the grid gallery to open the Gallery menu.

2. Select Style.

3. Select Tile Border. 

4. Use the color picker to select the desired border color.

5. Use the Width slider to select the desired border width

6. Use the Corners slider to customize the roundness of the border corners. This setting helps you create rounded borders.

7. When ready, simply close the Tiles Style panel.

Changes will be saved automatically.

Customizing image tile shadow:

1. Click on the grid gallery to open the Gallery panel.

2. Select Style.

3. Select Tile Shadow.

4. Use the color picker to select the desired shadow color.

5. Use the Horizontal offset slider to set the horizontal offset of the shadow. You can also enter the numeric value, in pixels, in the text field provided. A positive value means the shadow is drawn to the right side of the image; a negative value means the shadow is drawn to the left side.

6. Use the Vertical offset slider to set the vertical offset of the shadow. You can also enter the numeric value, in pixels, in the text field provided. A positive value means the shadow is drawn below the image; a negative value means the shadow is drawn above.

7. Use the Blur slider to customize the blur radius. You can also enter the numeric value in the text field provided. The blur radius defines how big and how much blurred the shadow is. A larger value makes the shadow lighter, and a value of 0 makes the shadow’s edges sharp.

8. Use the Spread slider to customize the spread distance. You can also enter the numeric value in the text field provided. The spread distance makes the shadow bigger (ie. expand) in all directions.

9. When ready, simply close the Tiles Style panel.

Changes will be saved automatically.