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6. The Tools in the Toolbox / 6.2 Tools for All Kind of Layers

### 6.2.4 The Measurement Tool

The measurement tool is used to measure distances and areas in a document. In order to convert the pixels of a document into another unit the resolution value in the Document Attributes (see chapter 4.9) will be used. If you are working in a picture, the resolution of the background layer is used which can be modified by using the Layer Attributes (see chapter 4.11).

By clicking and dragging the following information is displayed:

- position of the start point
- position of the end point
- width and height of the current line
- length of the current line
- angle of the current line

All values are shown using the unit chosen in the Tool Settings.

In order to calculate an area, there has to be a lasso or a vector layer. If you want to measure the area of a vector layer, it has to be the active layer. By clicking on Calc Area the area of the lasso or vector layer is calculated.

Keep in mind, that all measurements are only approximations.