For pictures hosted on LTG the picture size, and the possibility of enlarging it, are determined by the original upload.
Almost any image from your browser can be saved and manipulated locally but doing so usually results in a loss of clarity. You are not zooming and thus using more pixels from the original. You are instead changing how much of your screen each pixel takes.
I need better vocabulary for the difference between displaying the same number of pixels in a larger screen area and displaying more pixels from the original in the same or larger screen area.
I wish I could enlarge the picture.
Upload a "bigger" version?