Docs: Add agenda plugin to structure guide

doc/user/events/structureguide.rst

@@ -126,23 +126,37 @@ Assuming you already created one or more products for your general conference ad
 Option C: Add-on products with variable time slots
 """"""""""""""""""""""""""""""""""""""""""""""""""
 
-The above option only works if your conference uses fixed timeslots and every workshop uses exactly one timeslot. If
+The above option only works if your conference uses fixed time slots and every workshop uses exactly one time slot. If
 your schedule looks like this, it's not going to work great:
 
-+------------+------------+-----------+
-| Time       | Room A     | Room B    |
-+============+============+===========+
-| body row 1 | column 2   | column 3  |
-+------------+------------+-----------+
-| body row 2 | Cells may span columns.|
-+------------+------------+-----------+
-| body row 3 | Cells may  | - Cells   |
-+------------+ span rows. | - contain |
-| body row 4 |            | - blocks. |
-+------------+------------+-----------+
++-------------+------------+-----------+
+| Time        | Room A     | Room B    |
++=============+============+===========+
+| 09:00-11:00 | Talk 1     | Long      |
++-------------+------------+ Workshop 1|
+| 11:00-13:00 | Talk 2     |           |
++-------------+------------+-----------+
+| 14:00-16:00 | Long       | Talk 3    |
++-------------+ workshop 2 +-----------+
+| 16:00-18:00 |            | Talk 4    |
++-------------+------------+-----------+
 
-**This option is currently only available on pretix Hosted. If you are interested in using it with pretix Enterprise,
- please contact sales@pretix.eu.**
+In this case, we recommend that you go to *Settings*, then *Plugins* and activate the plugin **Agenda constraints**.
+
+Then, create a product (without variations) for every single part that should be bookable (talks 1-4 and long workshops
+1 and 2) as well as appropriate quotas for each of them.
+
+All of these products should be part of the same category. In your base product (e.g. your conference ticket), you
+can then create an add-on product configuration allowing users to add products from this category.
+
+If you edit these products, you will be able to enter the "Start date" and "End date" of the talk or workshop close
+to the bottom of the page. If you fill in these values, pretix will automatically ensure no overlapping talks are
+booked.
+
+.. note::
+
+    This option is currently only available on pretix Hosted. If you are interested in using it with pretix Enterprise,
+    please contact sales@pretix.eu.
 
 
 Use case: Discounted packages