[Feature Request] Proportional Resizing and Center Alignment Assistance for Imported Frames

[bqliang]

Due to certain special reasons, I often need to create a blank animation and then drag a series of images (frames) into the window for editing. Since the dragged-in images usually have different dimensions compared to the canvas, I am required to reposition and resize both the canvas and the images. Here's where the headache starts: I want to resize the images proportionally, but it's simply not possible! Even if I hold down the Ctrl key while dragging the image handles, I still can't lock the aspect ratio like in Photoshop. Additionally, I want to center the image on the canvas, but without any snap effect or guide lines, no matter how much I drag, the image is very difficult to align perfectly in the center of the canvas.

Therefore, I would like to request the possibility of addressing the following two issues in a future update:

When inserting frames, if the size is inconsistent, allow holding down the Ctrl key to lock the aspect ratio while resizing the images and the canvas.
Provide a snap effect or guide lines to assist in better positioning the images in the center of the canvas.