Photoshop

Use scale markers (Photoshop Extended)

Measurement scale markers display the measurement scale used in your document. You should set the measurement scale for a document before creating a scale marker. You can set the marker length in logical units, include a text caption indicating the length, and set the marker and caption color to black or white.

Create a scale marker

  1. Choose Analysis > Place Scale Marker.
  2. In the Measurement Scale Marker dialog box, set the following options:
    Length
    Enter a value to set the length of the scale marker. The length of the marker in pixels will depend on the measurement scale that is currently selected for the document.

    Display Text
    Select this option to show the logical length and units for the scale marker.

    Text position
    Displays caption above or below the scale marker.

    Color
    Sets the scale marker and caption color to black or white.

  3. Click OK.

The scale marker is placed in the lower left corner of the image. The marker adds a layer group to the document, containing a text layer (if the Display Text option is selected) and a graphic layer. You can use the Move tool to move the scale marker, or the Text tool to edit the caption or change text size, font, or color.

For a video on understanding and using the measurement features, see www.adobe.com/go/vid0029.

Add or replace scale markers

You can place multiple scale markers in a document, or replace existing markers.

Note: Additional scale markers are placed in the same position on the image and may obscure each other, depending on their length. To view an underlying marker, turn off the scale marker layer set.
  1. Choose Analysis > Place Scale Marker.
  2. Click Remove or Keep.
  3. Enter settings for the new marker and click OK.

Delete a scale marker

  1. In the Layers palette, select the Measurement Scale Marker layer group for the scale marker you want to delete.
  2. Right-click the layer group and select Delete Group from the context menu, or click the Delete Layer button.
  3. Click Group and Contents.