I am trying to program a single questionnaire as to be sent to participants in two waves. I tried to use the mailResume command but I need an id for the category "mailing" and I can't find it (you activated the mailings function but cannot find any code I could include in the syntax):
mailResume(caseSerial(),XXX, 1 * 3600);
Also, I do not get quite well how this can be used in combination with the buttonHide function...Could you help me out?
On another note, I tried to center the images I inserted for my experimental treatments and include commands such as "margin" but the button "next" is still too far below the image...any clue how can I fix that?