Is there a way to delete all my overset text at once?

It may also work by selecting all (area) type objects, converting them to point type objects in the Type menu (a warning message should appear then, informing that you are going to clear all overset text with that step) and then converting the point type objects back to area type objects.

EDIT: Sorry! On my phone I couldn't see which forum this was posted in and I assumed it was Indesign. Please ignore this answer because it is a script for Indesign.

Hi @Lalo Mc. Fly, here's a script that should do this. I just wrote it now, so it's quite untested, so have a careful look through your document after using it.

- Mark

/**
 * Remove All Overset Text In Active Document for Indesign
 * @author m1b
 * @discussion https://community.adobe.com/t5/illustrator-discussions/is-there-a-way-to-delete-all-my-overset-text-at-once/m-p/13832918
 */
function main() {

    var doc = app.activeDocument,
        stories = doc.stories.everyItem().getElements(),
        counter = 0;

    for (var i = stories.length - 1; i >= 0; i--) {

        if (stories[i].overflows == false)
            continue;

        var lastTextFrame = stories[i].textContainers[stories[i].textContainers.length - 1];
        var overFlowText = stories[i].characters.itemByRange(lastTextFrame.texts[0].insertionPoints[-1], stories[i].insertionPoints[-1]);

        if (overFlowText.isValid) {
            overFlowText.remove();
            counter++;
        }

    }

    alert('Removed ' + counter + ' overset texts.');

};

app.doScript(main, ScriptLanguage.JAVASCRIPT, undefined, UndoModes.ENTIRE_SCRIPT, 'Remove All Overset Text');