If the value "-1" is passed in as one of the values in pageSizes input for the PagerPageSizesComponent, that option should be shown as "All" and should show all rows available for the grid.
Hello,
The Grid pager now supports passing a collection of objects with text and values for the pagesizes. If one of these objects' value is "all", the Grid will assume a page size equal to the total number of items, and render all of them:
https://www.telerik.com/kendo-angular-ui-develop/components/grid/api/PagerPageSizesComponent/
https://www.telerik.com/kendo-angular-ui-develop/components/grid/api/PageSizeItem/
Regards,
Dimiter Topalov
Progress Telerik