I've installed a Grohe #33413 Eurodisc bathroomm faucet and have a problem adjusting the poo-up drain plug. Would appreciate your help. Many thanks.

There are two adjustment points behind the sink drain. A rod sticks out of the drain usually pointing straight back horizontally. A perforated metal strip sticks straight down from the faucet. You can stick the rod through the different perforation holes, higher the hole the more the stoppper will open. At the top of the perforated strip is a set screw that can be used to raise and lower the perfortaed strip. This attaches the strip to the knob you pull to activate the stopper.