Open composer and the actual scale of the map can be set by selecting the map area and setting the scale in ‘Item Properties’ shown below.
Click on the “Add new scalebar” button on the left side bar.
Once the scalebar has been added, you can modify the number of segments and height. The units can also be modified in the item properties.
To add a numeric scale click on the “Add new scalebar” button again and place under the first scalebar. Another scalebar will appear. Go to the Item Properties menu again and under main properties change the ‘Style’ to Numeric and uncheck the ‘Background’ box to make the box transparent as shown below.
