Adding pictures to a Microsoft Excel worksheet can improve visualization, understanding, and overall presentation. However, floating images are notorious for causing layout issues when rows, columns, ...
You can lock cells in Excel by heading into the program's "Protection" tab. There, you can set a password, and protect your data.
To manually crop a picture in Microsoft Word, Excel, or PowerPoint, select it, and in the Picture Format tab on the ribbon, click the top half of the split "Crop" button.