There are a few things you need to know before editing a pre existing text in Photoshop. First, the text must be in a format that Photoshop can understand. This means that it must be in a text file, and not an image file. Second, the text must be in one of the following formats: Text Format: txt Text File Format: txtx Now that you have all of the necessary information, let’s take a look at how to edit a pre existing text in Photoshop. To start, open up your document and make sure that it is in the text format. Next, create a new layer by clicking on the New Layer button on the toolbar and then name it “Text.” Once created, drag and drop the content of your document into this new layer. Finally, click on the Edit button on the toolbar and select Text from the dropdown list. Once selected, click on OK to close out of Photoshop.