Account Summarization
You can set up multiple GL account summary grouping schemes for use in Balance Sheet and Profit & Loss Statement reports.
Each account has a Standard summarization level that you can specify when adding or editing a GL account with the Standard Summarize to Account field. When running reports you can select Standard for the Summary Level option and accounts will group based on the Standard Summarize to Account field.
You can also set up additional custom summarization levels (when the General Ledger Summarization add-on is active). Go to Admin -> Ledger -> GL Summary Levels to add new levels. You can assign accounts to the summary levels when adding or editing GL accounts individually, or you can go to Admin -> Ledger -> Assign Summarization and set up multiple GL accounts to summary levels at once.
When running GL reports, select the summarization level for display with the Summary Level option.
Another way to get some GL account grouping is by using GL Cost Centers. With the GL Cost Center add-on you can assign GL Cost Centers to expense GL accounts and then run the Profit & Loss Statement and select the option Subtotal Expenses By Cost Center. The report will show individual line totals for each expense type, but will also include a total for each Cost Center.