How to conduct I-shaped tiling

Left-click and drag the tile into the drawing area – modify the tile's height in the product properties column on the right side of the interface, for example, change it to 400

Right-click to copy the tile and paste it

Left-click on the top left corner of the tile and move it to snap to the midpoint of the bottom edge of the tile above

Select both tiles by left-clicking and dragging a selection box around them

Press the shortcut key F to completely fill the area with tiles