I am looking to achieve the following:
Moving files between components while maintaining history.  (steps are included in the answer by Geoffrey Clemm)
https://jazz.net/forum/questions/125188/why-does-moving-files-between-components-not-maintain-history

The first two steps are as follows:
- create a dummy project and share it into your component.
- do a regular move of the things you want to move into that dummy project

I am not able to do the 'regular move of the things you want to move'.
The file I want to move is not a project, just ordinary files and folders. (I will call it File A)
In Eclipse client, when I look at the package explorer, it only shows projects, so File A doesn't appear, hence I cannot move them.
In Eclipse client, when I right click a component and click 'show'>'repository files', I can see all the files including File A. However in this view I cannot move files whether right click or drag/drop.
In Web client, when I show the contents of the components, I can see all files, however there is no option to move files around.

(I have also checked this forum post where similar steps are provided:
https://jazz.net/forum/questions/228403/scm-move-a-file-without-loosing-history-into-another-folder-in-same-component?redirect=%2Fforum%2Fquestions%2F228403%2Fscm-move-a-file-without-loosing-history-into-another-folder-in-same-component
Although likewise there is just the recommendation of moving files into a dummy project, but not how)

Am I overlooking something? What does this 'regular move' mean and how do I do it?