A curtain looks generous when hanging straight, then surprisingly thin when pulled into a tight tieback. The fabric has not changed; its folds and the visible window area have.
Try the arrangement before fixing the hardware
Use a safe temporary way to hold the proposed gathering without damaging the fabric or wall. Compare a higher and lower position, then step back to the place from which the window is normally seen. Observe the folds, exposed glass and how much fabric occupies the space beside the window.
Keep the curtain’s construction in mind. Heavy lining, a stiff heading or a delicate textile may respond differently from an unlined lightweight panel. Do not force a tight bundle simply because a display photograph used one.
Check the movement as well as the appearance
Open and close the curtain using the intended routine. Can the tieback be released comfortably? Does the fabric rub against furniture or interfere with a handle, radiator or other fitting? Follow relevant safety and clearance guidance for nearby equipment.
Think about who will operate it. Avoid loose cords or loops that could create a hazard, particularly around children and pets. Choose and install a suitable product according to its instructions rather than improvising a long decorative cord.
Measure from a fixed reference
Once the position works, record it relative to the window or another stable reference, not only from a piece of movable furniture. For paired curtains, compare the visual result as well as the measurements; an uneven floor or window can affect what looks balanced.
Use appropriate fixings for the wall and expected load. If you are unsure about hidden services or the substrate, ask a qualified installer instead of drilling experimentally.
After fitting, inspect the fabric where it gathers. A sharp edge or abrasive fitting can damage it over time. Adjust the arrangement if the curtain cannot be released without pulling.
A tieback is both a small styling choice and a repeated handling point. The best position works when the curtains are open, when they are closed and when someone is moving between those two states.