Are your images looking a little fuzzy? There's not a way to sharpen them once they're uploaded into your site. However, there are some things you can try in your image editing software to create crisper images you can upload into your site.
If you're having trouble uploading your images into the Branding Tab, start by making sure they are JPG (jpeg) and each one is correctly sized for the space you're trying to upload it into. Need a refresher on branding? Click here.
Ways to Clarify Your Images
Increase the resolution.
The easiest and fastness is to change the way you save. Most image editing software defaults to saving at a mid-range quality, but you can increase the sharpness of an image by saving it at a higher resolution. In Adobe, use save for web. In Canva, when you choose download, there's a slider just below "under size" for quality. Push it as close to 100 as you can.
Don't save too often.
Overall, JPG images are smaller files than PNG images which leads to faster load times for your site. This is one of the reasons the system requires that type of file in the branding section. However, JPG files get their small size from being compressed. Every time you save a JPG file, the file is compressed further. All that compression can lead to blurry images.
When you're working with images like the ones in your branding tab, try to reduce the number of times you save over them or save them as PNG files as you're working with them and then convert them to jpg when you're done tweaking them.
Try increasing the contrast.
Depending on the program you're using, you can also try using the unsharp masking tool. This sounds like it'll make your image blurrier, but it can actually help. The tool works by refining edges, improving an image's crispness. This makes a low resolution image look like it's a higher resolution image. Be careful though. If you use it too much, you can get little white (or other color) pixels in your image. If you start to see that, use the undo function restore the image.