Not directly, but there is a roundabout way to do this in 2.6 (you need advanced conditions to accomplish it, which aren't available for layout items pre-2.6).
As an example, I modified the default layout (Blue and Green). Usually it displays, in the first column, the Round number and below that the number of Entries. I modified it to display only one of those at a time, at 5 second intervals, like this:
- Edit Rounds cell
- Select Even Rounds property set
- Press Conditions button
- Select "Use advanced conditions"
- Set conditions to:
isRound and (roundNum % 2 = 0) and ((timeofday % 10) < 5)
- Press OK to close Conditions dialog
- Press "New" to create a new Property Set and named it "Odd Rounds"
- Select "Odd Rounds" property set
- Press "Copy" and select "Default" property set, to make "Odd Rounds" essentially a copy of the Default property set
- Press Conditions button
- Select "Use advanced conditions"
- Set conditions to:
((timeofday % 10) < 5)
- Press OK to close Conditions dialog
- Select Default property set
- Check the "Hide" checkbox
- Press OK to save changes to the "Rounds" cell
- Edit Entries cell
- Select Even Rounds property set
- Press Conditions button
- Select "Use advanced conditions"
- Set conditions to:
isRound and (roundNum % 2 = 0) and ((timeofday % 10) > 4)
- Press OK to close Conditions dialog
- Press "New" to create a new Property Set and named it "Odd Rounds"
- Select "Odd Rounds" property set
- Press "Copy" and select "Default" property set, to make "Odd Rounds" essentially a copy of the Default property set
- Press Conditions button
- Select "Use advanced conditions"
- Set conditions to:
((timeofday % 10) > 4)
- Press OK to close Conditions dialog
- Select Default property set
- Check the "Hide" checkbox
- Press OK to save changes to the "Entries" cell
In a nutshell, this makes the Rounds dialog use the "Default" property set for 5 seconds, which has the Hide feature enabled, and then use one of the other two property sets for 5 seconds, depending on whether it's an even round or odd round. It also makes the Entries dialog do the same thing, but on the alternating 5 seconds. Therefore only one of those two cells is displayed at a time.
For your use, you would need to modify the ((timeofday % 10) > 4) part of the conditions. The expression (timeofday % 10) gives the remainder when you divide the timeofday (which is actually the number of seconds since a specific point in time) by 10. Therefore, it will always have a value of 0 through 9. As an example, if you wanted to rotate 3 different items and wanted each item to be shown for 8 seconds, you would do the same thing I did (but to an additional 3rd cell as well), and the "time of day" part of the expressions would be:
((timeofday % 24) < 8)
and for the 2nd cell
((timeofday % 24) > 7 and (timeofday % 24 < 16))
and for the 3rd cell
((timeofday % 24) > 15)
