justintaylor-dev

// Selects all Unparented Layers

var layers = app.project.activeItem.layers;
var num = app.project.activeItem.layers.length;
for(var i = 0; i < num;i++){
    var layer = layers[i+1];
    layer.parent === null ? layer.selected = true: null;
}

justintaylor-dev

// Resets All Position Values to 0
app.beginUndoGroup('Reset 0');
var selectedLayers = app.project.activeItem.selectedLayers;
for (var i = 0; i < selectedLayers.length; i++) {
    var layer = selectedLayers[i];
    var is3D = layer.threeDLayer;
    if(layer.transform.position.canSetExpression){
        layer.transform.position.setValue([0,0,0]);
    }else{
        layer.transform.xPosition.setValue(0);

justintaylor-dev

// Inverts selected layers in the Active Comp

var active = app.project.activeItem;
if (active && active instanceof CompItem) {
    var layerLen = active.layers.length;
    for (var i = 1; i < layerLen + 1; i++)
        active.layers[i].selected = active.layers[i].selected === false;
}

justintaylor-dev

// Resets Position, Scale, and Rotation on selected 2D or 3D Layers

app.beginUndoGroup('Reset PSR');
var selectedLayers = app.project.activeItem.selectedLayers;
for (var i = 0; i < selectedLayers.length; i++) {
    var layer = selectedLayers[i];
    var center = [Math.round(app.project.activeItem.width / 2), Math.round(app.project.activeItem.height / 2), 0]
    var is3D = layer.threeDLayer;
    if(layer.transform.position.canSetExpression){
        layer.transform.position.setValue(center);

justintaylor-dev

var sequence = app.project.activeSequence, trackGroups = [sequence.audioTracks, sequence.videoTracks], items = [];
for (i = 0; i < trackGroups.length; i++) {
        var trackCount = trackGroups[i].numTracks;
    for (j = 0; j < trackCount; j++) {
            var clipCount = trackGroups[i][j].clips.numItems;
        for (k = 0; k < clipCount; k++)
            trackGroups[i][j].clips[k].setSelected(!1 === trackGroups[i][j].clips[k].isSelected());
    }
}

justintaylor-dev

// Premiere Pro CC2018 and later
for (var selection, viewIDs = app.getProjectViewIDs(), i = 0; i < viewIDs.length; i++)
    if (app.getProjectFromViewID(viewIDs[i]).name == app.project.name) {
        selection = app.getProjectViewSelection(viewIDs[i]);
        break
    } 
for (i = 0; i < selection.length;i++){
    var item = selection[i];
    item.videoComponents[0].properties[25].setValue(1); // set to REDgamma3
    // item.videoComponents[0].properties[25].setValue(4); // set to REDlogFilm