To let users know about the per-wiki tracking limit, we will add:
- **A note on the Event Settings page** next to the Wikis field(s) (see design below)
- **A ? help icon that links **to https://meta.wikimedia.org/wiki/User:JMatazzoni_(WMF)/drafts/Event_Metrics_help#Creating_a_new_event
- **Icon hover text**: Learn more
===Language for the note
- The system can track up to 50,000 pages, files or items on each wiki. [?]
{F28477916 width = 500}
```lang=html
<label class="control-label required" for="event_wikis_0">Wikis</label>
<br>
<small>
The system can track up to 50,000 pages, files or items on each wiki.
<a href="#">
<span class="glyphicon glyphicon-question-sign" aria-hidden="true"></span>
</a>
</small>
```
===Why we're doing this
Event Metrics imposes a per-wiki maximum for how many pages (on Wikipedias), files (on Commons) or items (on wikidata) can be tracked. The maximum is 50,000 per wiki. This note will let users planning very large events (which happens on Commons and Wikidata, especially) know that they may need to divide their event up into separate events, e.g., by categories.