Step 1

Add a text label by selecting "Add label" > "Text label":

Step 2

The label appears on the background:

Step 3

Using the mouse, click on the measuring point box and drag and drop the box to the desired location:

Step 4

Click on the text within the dialog box saying "Enter text here..." to open up the label's menu:

Step 5

Text: Click on text to enter the desired text.

Step 6

Text size: select between "normal", "large" and "extra large" and click on "OK".

"Normal", "large" and "extra large" are shown in the same order below:

Step 7

Background color: select a color for the background and click on "OK"

Step 8

Text color: select a color for the text and click on "OK"

Step 9

Delete: click on "Delete" to delete the text label.

Step 10

Apply for all labels: click on "Apply for all labels" to apply the settings for all labels.