On end of the mechanism that fits inside the headrail there is a silver collar circled in the image below.
Roman blind chain lift mechanism.
There may either be one pulley at the end of the shade with multiple cords strung through it or a pulley mechanism along the headrail where each vertical cord feeds.
On this there is a small grub screw this is silver on a 1 4 mechanism and black on.
Roman shades can be operated by pulling on strings using a continuous loop of cord or bead chain with a retractable pull cord by an internal cordless system or be motorized.
If the blind is going up as fast as you are pulling the chain then you have a 1 1 mechanism.
There are a variety of different styles of roman shades including hobbled waterfall plain fold flat balloon rear tucked austrian london tied and relaxed.
If the blind is going up slower than you are pulling the chain then you have a 1 4 mechanism.
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These mechanisms also lock automatically when you use them meaning that you can have the raised half way and held in place without the need for a cleat.
All our roman blinds are supplied with a nylon cord lock system that is positioned just behind the fabric to keep it hidden and out of view.