Delphi XE4 is nice and the Firemonkey framework is a lot more stable than the version that was included with XE2.
However there is still a lot of functionality missing and that is why I added MultiSelect to the TGrid component.
I’ve choosen to create a copy of the original file and hopefully Embarcadero wil include it with their next update.
In the attached PDF you can read which changes are needed in the original source code. I’ve only included the changes. If someone of Embarcadero gives permission to publish the whole file then I will update the post with it.
To use this is your project, just make sure the changed file is in the search path before the original dcu / pas file.
You will not be able to change the MultiSelect in the IDE (it is not used for the components in Delphi) but you can change the MultiSelect property in the OnCreate event of your form.
PDF with the explanation about adding MultiSelect to the Firemonkey grid: