First, open the ps software and import a black and white seal picture, as shown below.
2. Click "New Layer" to add a new layer.
Third, set the current scene to red, as shown below.
4. Select the oval box selection tool to box the sealing area, as shown below.
5. Press the shortcut keys alt and delete at the same time to fill the selection with red, as shown below.
6. Change the type of the current layer to color. At this time, the black and white seal will turn red.
So use ps to turn the seal red and it's done.