That really will get everyone on the line.
That will get everybody on the line but not necessarily everybody in the tree. I think the only way to get everybody in the tree is my suggestion to make a copy of the database and therein to break the tree apart into two trees that hopefully are not conjoined somewhere else.
The best way to think about this is to consider the following two scenarios. You could try both scenarios in your live database because neither one of the scenarios is going to break anything.
- Make a new group containing a person of your choice and a bunch of other people as well. Define the "bunch of other people" as follows. The process of making a new group will take you to the Select People dialog. Highlight the person of your choice and click Mark Group. Click on Everyone in the highlighted person's tree. A bunch of people will be marked. If you complete the process of making the group, all those people will be in your group.
- Make a new group containing a person of your choice and a bunch of other people as well. Define the "bunch of other people" as follows. The process of making a new group will take you to the Select People dialog. Highlight the person of your choice and click Mark Group. Click on Ancestors of Highlighted person. Choose the Ancestors and Descendants of Ancestors option and choose a really large number for both the generations of ancestors and the generations of descendants. A bunch of people will be marked. If you complete the process of making the group, all those people will be in your group.
The problem at this point is that scenario #1 typically will mark a much bigger bunch of people than will scenario #2. In particular, scenario #1 will pick collateral lines both for your person of choice and for the spouses of your person of choice. Scenario #2 will not get either collateral line. I think what is being asked for is secret Scenario #3 where you get all the collateral lines for your person of choice but not for the spouses of your person of choice. That's why I think that making a copy of your database and breaking some links in the copy is the only solution to the problem that is supported by RM.
Upon further review, there might seem to be another possibility. In particular, in Scenario #2 under the Ancestors of Highlighted person option there is a button to request Ancestors and all collateral lines. I think it's very, very close to what you want. Indeed, I think it has everybody you want and nobody else with the exception that it doesn't have the descendants of the person of choice and the collateral lines of the descendants. It's easy to do one more marking to get those descendants. Now, you are very, very, very close to what you want. The only problem would be if any of those descendants had spouses who had other spouses. The other spouses and their kin would not be included, and they and their kin would be included in my procedure of making a copy of the database and making a link. You would just have to evaluate on a case by case basis whether this simpler procedure is adequate.
As esoteric as this business of spouses of spouses and their kin may sound, I run into the problem all the time in preparing reports for family reunions where a family member's spouse had a previous marriage and had children from the previous marriage. Everybody at the reunion wants to see those children in the report.