How to convert an image to RGB image mode and then edit it-PS tutorial

During the operation, the following message is displayed: convert the image to the RGB image mode before editing. how can this problem be converted? There is a good method below. when you try to operate it, you will be prompted: first convert the image to the RGB image mode and then edit it. how can we convert it? The following is a good method. you can try to operate the image. sometimes, a prompt is displayed: first convert the image to the RGB image mode and then edit it. the steps are as follows:

Select "mode" in "image", and then select "RGB color ",
Then edit the file.