We have two sets of patio doors at the back of the house, and would like to put some blinds or similar up to add a bit of colour and provide some insulation. I've seen people on here mention curtains panels (e.g. the Ikea ones), but am assuming that once they are up they are just up and don't retract - is this correct? Am thinking the easiest option will be roller blinds, but quite big area, approx 250cm x 150 cm. Any other bright ideas? Both doors open outwards and have a bit at the top which is just glass rather than door. Don't want to do curtains. Thanks.