Q: I have a database that uses container fields to display PDF files. I want to print from a list view, and in cases where there is no PDF in the container field, I want the next full container field to slide up and take the space occupied by an empty one. For some reason, sliding objects isn't working on the container fields. Any ideas how to make it happen?

Figure 1: Set Sliding -- You can only see the sliding effect in Preview mode or when you print the screen. To have subsequent records slide up, you must select "Also reduce the size of the enclosing part."
Q: I have a database that uses container fields to display PDF files. I want to print from a list view, and in cases where there is no PDF in the container field, I want the next full container field to slide up and take the space occupied by an empty one. For some reason, sliding objects isn't working on the container fields. Any ideas how to make it happen?
A: For those of you who aren't familiar with this feature, you can access the sliding objects feature via Set Sliding/Printing from the Format menu (figure 1).
It's a handy feature, but it stops working under specific circumstances. For text fields, setting the vertical alignment to center or bottom causes the sliding effect to stop working. For container fields, setting the graphic vertical alignment to center or bottom causes the sliding effect to stop working.
Your problem is that you have your container field vertical alignment set to center. Setting it to top alignment gives you the desired effect.