cam2pc is also able to crop your images. While displaying an image choose the Crop option from the popup menu. The cursor should change indicating that the cropping mode is engaged. Now click and drag around the part of the image that you want to keep. cam2pc will darken the part of the image that will be discarded and indicates the size of the defined crop area. You can edit the crop area by dragging the various handles located around it.
Once you are satisfied with the area, right-click and select the Crop option. cam2pc will ask you for a filename to save the cropped image. You can change the file format of the new image. If you select JPEG then you will be asked for the JPEG Quality. Choose 100 for a minimum compression resulting in the best image quality.
When the image you are cropping is a JPEG file, cam2pc is able to do lossless compression. Lossless compression means that the cropped image will not be recompressed resulting in image detail loss. Instead cam2pc will simply extract the compressed information from the original image and rewrite exactly identical in the new file. Therefore, you will not be prompted for the JPEG quality of the new file as there is no recompression happening. To be able to do this, the cropping are must match certain criterions that depend on the original file. If you select Lossless crop in the contextual menu then the area will be adjusted to match those criterions. If you want to check those adjustments before cropping you can select the "Adjust crop area for lossless cropping" in the contextual menu.