# Slot conversion The editor should be loaded with a "box" element that contains multiple "slots" in which user can edit content. An additional converter adds `"data-insert-count"` attribute to view elements to show when it was rendered. It is displayed with a CSS at the top-right corner of rendered element. If a view element was not re-rendered this attribute should not change. *Note*: it only acts on "insert" changes so it can omit attribute-to-element changes or insertions not passed through dispatcher. Observe which view elements are re-rendered when using UI-buttons: * `Box title` - updates title attribute which triggers re-rendering of a "box". * `Box author` - updates author attribute which triggers re-rendering of a "box". * `+` - adds "slot" to box" which triggers re-rendering of a "box". * `-` - removes "slot" from box" which triggers re-rendering of a "box".