Do you need more contrast in the Office apps? See Change the look and feel of Microsoft 365. You can change the brightness, contrast, or sharpness of a picture by using the Corrections tools. Adjust the brightness, sharpness, or contrast. Click the picture that you want to change the brightness for. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.