Many images are adequate as they are. Others are better edited.
Save a duplicate of the original as back up.
Consider how to improve the image.
Editing options available depend on your platform and available software.
Preview for Mac
On a Mac computer, by default, clicking on an image opens up Preview.
Tools / Show Inspector
Shows image information
Shows file information
Add keywords
Preview image editing options are:
Tools / Adjust colour
Auto Levels are usually best
Exposure and contrast may be useful if you didn’t adjust these on the camera
Tools / Annotate
This is used for pointing out something of interest
To crop the image, eg to place subject in centre of image or shrink background
Tools / Rectangular selection
Drag the rectangle to select part of the image
Tools / Crop (or ⌘K)
After you have completed editing, save a resized version that has a width between 1200 and 2400 px, as a high-quality JPG file to be used for your referral.
Tools / Adjust Size
Check Scale proportionally and resample image
Type in the desired width in pixels
Resolution is 72 pixels/itch for viewing on screen
PictureViewer and Paint on PC
Clicking on an image on a PC opens Windows PictureViewer by default. Click on the edit icon. This opens the image in Paint by default. Explore editing options.
My version of Paint does not allowing zooming out below 100%.
Image / Attributes is used to resize the image.
There are many better and free image editing programs available for download.