For 2D point styles in Layer style 
, you can upload a custom marker from your desktop. Save the scene first to allow you to upload the icons.
To upload a custom marker, do the following:
- Click Marker.
- Click Custom.
- Click + Upload image to add a custom icon.
- Locate the image you want to upload.
- Click + Upload image to add more icons.
- Click the icon in the custom gallery you want in your scene.
- Click Done.
Image requirements:
- Up to 256 by 256 pixels
- Up to 1 MB
- Image format: PNG or JPEG
Note:
The icons you upload are available only in your scene. You can share your scene with the custom icons, but a copy of the scene can't be saved.