From product version 100.0.27.0, you can enable a feature that makes it possible to preview all postings done to the G/L.
To enable this functionality, first go to the Lease Setup page, and under the Accounting Settings tab, Gen. Journal section, select your preferred method on field Journal Posting Type.

There are three different methods - All Straight to G/L, All Entries to Journal, and Ask Everytime.
These methods are relevant when running action Post to G/L.

Check out how to to monthly postings here.
Posting with All Straight to G/L Method
All straight to G/L method is the default and regular option, which simply posts all entries to the General Ledger immediately.
Posting with All Entries to Journal Method
All entries to Journal method will transfer all entries to a journal. You can review all rows and select the Preview Posting to see what entries the journal will post. Then, after review, you have to Post the system defined journal.
Let's review an example. We want to post the month of February for lease V2_L02. Simply enter the period and specify the lease.

After clicking OK, a confirmation window will appear. Select Yes here.

You will be informed that certain entries were transferred to the General Journal. Click OK.

To review and post the entries, select Open Journal and click OK - it will take you straight to the journal, where all the new lease entries (which are not yet posted) are located.

Below you can see the entries generated for one lease, for the month of February. You can review the rows.

You can also review how the entries will look in the General Ledger, by selecting Downwards Arrow → Preview Posting.

Select the highlighted number under No. of Entries to review each entry that will be posted.

Once you are sure everything looks okay, you can go back and select Post - then the entries will be posted to the General Ledger.
Posting with Ask Everytime Method
When Ask everytime method is used, on confirmation page of Post to G/L action, an additional Transfer to Journal option appears, letting you decide each time if you want to post to the G/L immediately, or to first transfer the entries to a journal for further review. It essentially combines the first two methods into one.
The difference lies in the confirmation page. If you leave option Transfer to Journal disabled, it will work like method Straight to G/L. If you enable option Transfer to Journal, it will work as method All Entries to Journal.
