Install latest/stable of kruler
Ubuntu 16.04 or later?
Make sure snap support is enabled in your Desktop store.
KRuler is an on-screen ruler for measuring pixels. Position the 0 at your starting point and measure the precise pixel distance between the starting point and your cursor.
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Generate an embeddable card to be shared on external websites.
Choose your Linux distribution to get detailed installation instructions. If yours is not shown, get more details on the installing snapd documentation.