You can proportionally scale the original image. For best results the scaling should be done before performing any other operations on it like crop, rotate, etc. Note that if you make the image larger it may become fuzzy.

Original dimensions 450×297

The image can be cropped by clicking on it and dragging to select the desired part. While dragging the dimensions of the selection are displayed below.

• Arrow: move by 10px
• Shift + arrow: move by 1px
• Ctrl + arrow: resize by 10px
• Ctrl + Shift + arrow: resize by 1px
• Shift + drag: lock aspect ratio

Crop Aspect Ratio
You can specify the crop selection aspect ratio then hold down the Shift key while dragging to lock it. The values can be 1:1 (square), 4:3, 16:9, etc. If there is a selection, specifying aspect ratio will set it immediately.

Crop Selection
Once started, the selection can be adjusted by entering new values (in pixels). Note that these values are scaled to approximately match the original image dimensions. The minimum selection size equals the thumbnail size as set in the Media settings.