To increase the size of icons and buttons on the taskbar. If you intend to keep the taskbar at its current height, lock the taskbar again so you don’t accidentally change its height. Likewise, if you use a vertical taskbar in Windows 10, move your cursor to the left or right edge of the taskbar and resize it from there. Once your taskbar is at a preferable height, release the mouse button. Click and drag the mouse up and the height of the taskbar will change accordingly.Once unlocked, move the cursor to the top edge of the taskbar and the cursor will change to a double-sided arrow.Right-click on the taskbar and uncheck Lock taskbar.