If the cell sizes are different, first do not select any object-there is fine-tuning displacement in the toolbar-enter 0. 1MM, then select your cell, align it edge to edge, select the cell you want to move, and press the arrow keys of the keypad, that is, move 0.1mm..
In addition, there is a problem of clicking the box: don't select any object-one of the toolbars is considered to be filled with color, so just cancel this item (the function of this item is to treat all the boxes as filled with color, so that even if you don't click the box, just click the area of the box and it will be selected).
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