First of all, you have to open Adobe Photoshop on your PC. Just click on start menu button and find Adobe Photoshop in the list of programmes. After finding it, click on it to launch it.
When Photoshop is opened, click on file in the menu bar and click on ‘New’ to open a new file. Select the specifications of the file quality according to your need. It is better to select high quality image specifications. If you don’t want to open a new file, you can simply open any image from your computer. Click on file in the menu bar and select ‘Open’. Then browse any image of your choice to open on your Photoshop.
After opening an image file, click on ‘Eraser’ icon which is displayed in the toolbox. You can simply choose the eraser tool, background eraser tool and magic eraser tool, if you click and hold the icon with your mouse. You can adjust the size of the eraser tool and the background eraser tool as per your requirement.
Then, click on the down-arrow which is next to ‘Brush’ option in the toolbar. You have to use the ‘Master Diameter’ slider to alter the size of the brush. Moreover, you can also choose to adjust preset brush which is given in the grid. In order to close the pop-up window, you will have to click the down-arrow again.