What is the report type chosen at creation?

Decides the records and fields available.

What is the in Development report type?

Only Manage Custom Report Types users can use it.

Deletes its reports; can't be restored.

Edit Properties, Display As in the field layout.

Up to two rows and two columns.

Up to three per report, five subfilters each.

Report builder options and custom report types | Platform Administrator Study Guide

Fact	Detail	Source
Report type chosen at creation	Decides the records and fields available	Build a Report (opens in a new tab)
In Development report type	Only Manage Custom Report Types users can use it	Create a Custom Report Type (opens in a new tab)
Deleting a custom report type	Deletes its reports; can't be restored	Edit or Delete a Report Type (opens in a new tab)
Rename a column for one report type	Edit Properties, Display As in the field layout	Rename Report Column Labels (opens in a new tab)
Groupings in Lightning builder	Up to two rows and two columns	Build a Report (opens in a new tab)
Summary formulas	Require at least one grouping	Summary Formula Column (opens in a new tab)
Unique counts per report	Up to three	Count Unique Values (opens in a new tab)
Cross filters	Up to three per report, five subfilters each	Cross Filter Limits (opens in a new tab)
Joined report blocks	Up to five, 2,000 records per block	Joined Reports (opens in a new tab)
Cross-block formulas	Up to 10 per joined report	Joined Report Formulas (opens in a new tab)
Adding a chart	Needs at least one grouping	Build a Report (opens in a new tab)
Subscription conditions	Up to five, all must be met	Subscribe to Reports (opens in a new tab)