Transformtion changes 2 (#27732)

* Removed prereq.md, updated description in Overview topic.

* Fixed relref for manage users.

* Update docs/sources/panels/transformations/_index.md

Co-authored-by: Torkel Ödegaard <torkel@grafana.org>

* Removed extra "the"

* Changed "In case" to "If"

Co-authored-by: Torkel Ödegaard <torkel@grafana.org>

docs/sources/manage-users/_index.md

@@ -9,7 +9,7 @@ weight = 3
 
 # Manage users
 
-Create users and teams and configure [Permissions Overview]({{< relref "../permissions/overview.md" >}}) to make sure that users only have access to the resources they need.
+Create users and teams and configure [Permissions]({{< relref "../permissions/overview.md" >}}) to make sure that users only have access to the resources they need.
 
 Only Administrators can manage users and teams.
 

docs/sources/panels/transformations/_index.md

@@ -29,11 +29,11 @@ Before you can configure and apply transformations:
 
 - You must have entered a query and returned data from a data source. For more information on queries, refer to [Queries]({{< relref "../queries.md" >}}).
   
-- You must have applied a visualization that supports queries. Examples are:
+- You must have chosen a visualization that supports your query result and chosen transforms. Different transformations can result in a data structure that only some visualizations can render. For example, Graph visualization cannot show reduced data (that results from the Reduce transform). If your current visualization does not show you what you expect after applying a transform, switch to the Table visualization to check the result. For more information on the different types of visualizations, refer to:
   - [Bar gauge]({{< relref "../visualizations/bar-gauge-panel.md" >}})
   - [Gauge]({{< relref "../visualizations/gauge-panel.md" >}})
   - [Graph]({{< relref "../visualizations/graph-panel.md" >}})
   - [Heatmap]({{< relref "../visualizations/heatmap.md" >}})
   - [Logs]({{< relref "../visualizations/logs-panel.md" >}})
   - [Stat]({{< relref "../visualizations/stat-panel.md" >}})
-  - [Table]({{< relref "../visualizations/table-panel.md" >}})
\ No newline at end of file
+  - [Table]({{< relref "../visualizations/table-panel.md" >}})ß

docs/sources/panels/transformations/prereq.md

-+++
-title = "Prerequisites"
-type = "docs"
-[menu.docs]
-identifier = "transformations_prerequisites"
-parent = "transformations"
-weight = 300
-+++
-
-# Prerequisites
-
-Before you can configure and apply transformations:
-
-- You must have entered a query and returned data from a data source. For more information on queries, refer to [Queries]({{< relref "../queries.md" >}}).
-  
-- You must have applied a visualization that supports queries. Examples are:
-  - [Bar gauge]({{< relref "../visualizations/bar-gauge-panel.md" >}})
-  - [Gauge]({{< relref "../visualizations/gauge-panel.md" >}})
-  - [Graph]({{< relref "../visualizations/graph-panel.md" >}})
-  - [Heatmap]({{< relref "../visualizations/heatmap.md" >}})
-  - [Logs]({{< relref "../visualizations/logs-panel.md" >}})
-  - [Stat]({{< relref "../visualizations/stat-panel.md" >}})
-  - [Table]({{< relref "../visualizations/table-panel.md" >}})