How can we either hide or grey out the upload icon in the Edit window? We have uploading disabled

[Kartoon]

This is how I hid the “center” button

button.center_ui_button.toolbar__button {
display: none !important;
}

Italics

button.italic.toolbar__button {
display: none !important;
}

So you’d just have to find whatever the upload button is called in console, swap it in the above, and put it in the CSS common for your themes