We can use symbols inside of images; like for sorting we can use upward or downward arrows.
Arrows
Ascending ↓ “↓”
Descending ↑ “↑”
Left Arrow ← “←”
Right Arrow→ “→”
Left Right Arrow ↔ “↔”
Return Arrow ↵ “↵”
Next ⟩
Back ⟨
Symbols
Register Symbol ® “®”
Copyright Symbol © “©”
Add Symbol ⊕ “⊕”
Remove Symbol ⊗ “⊗”
Here is full chart
http://www.digitalmediaminute.com/reference/entity/index.php
