Pre-populate the image URL insert dialog with a list of quick-access image entries using image-items-json.
@{
var imageItemsJson = System.Text.Json.JsonSerializer.Serialize(new[]
{
new { name = "Microsoft Logo", url = "/images/microsoft.svg", thumbUrl = "/images/microsoft.svg" },
new { name = "Intel Logo", url = "/images/Intel.svg", thumbUrl = "/images/Intel.svg" },
new { name = "Sample Photo", url = "/images/sample-photo.jpg", thumbUrl = "/images/sample-photo.jpg" }
});
}
<richtextbox
name="imageItemsEditor"
toolbar="default"
height="300px"
image-items-json="@imageItemsJson" />