To copy several buildings at once, press {0} or click the icon in the toolbar (1) to select the <b>copy tool</b> then click and drag across the desired buildings (2) tool. Let go of the mouse button and drag to where you want to place your copied buildings and left click once to place (3). You can <b>copy a single building</b> by hovering over it and pressing {1}.
To copy several buildings at once, press {0} or click the icon in the toolbar (1) to select the <b>copy tool</b> then click and drag across the desired buildings (2) tool. Let go of the mouse button and drag to where you want to place your copied buildings and left click once to place (3). You can <b>copy a single building</b> by hovering over it and pressing {1}.