Dear Wolfgang, I read your detailed explanation about the difference between "overlay" and "layer". Here is your sample code using layer. \starttext \definelayer[test] \setlayer[test][x=3cm,y=6cm]{ONE} \setlayer[test][x=8cm,y=2cm]{TWO} \setlayer[test][x=2cm,y=9cm]{THREE} \flushlayer[test] \stoptext It shows ONE, TWO, and THREE in the same page. I'd like to show each word one by one when I click, so I tested the following code. \setupinteraction[state=start] \usemodule[pre-60] \starttext \definelayer[test1] \definelayer[test2] \definelayer[test3] \setlayer[test1][x=3cm,y=6cm]{ONE} \setlayer[test2][x=8cm,y=2cm]{TWO} \setlayer[test3][x=2cm,y=9cm]{THREE} \StartSteps \flushlayer[test1] \FlushStep \flushlayer[test2] \FlushStep \flushlayer[test3] \FlushStep \StopSteps \stoptext This code produces 3 page output one word per each page. There is no need to click the mouse. I may misunderstand about the layer. However, is there a way to show each word one by one in the same page when I click. Best regards, Thank you. Dalyoung