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.
The most common lifting mechanism for a standard style roman shade is a pulley system.
If the blind is going up as fast as you are pulling the chain then you have a 1 1 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 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.
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