Move more docs into new structure

docs/source/usage_project.rst

@@ -69,55 +69,6 @@ addition to the word count.
    :guilabel:`Set as Document Name` from the context menu.
 
 
-.. _a_ui_tree_split_merge:
-
-Splitting and Merging Documents
--------------------------------
-
-Under the **Transform** submenu in the context menu of an item in the project tree, you will find
-several options on how to change a document or folder. This includes changing between document and
-note, but also splitting them into multiple documents, or merging child items into a single
-document.
-
-
-Splitting Documents
-^^^^^^^^^^^^^^^^^^^
-
-.. figure:: images/fig_project_split_tool.png
-
-   The **Split Document** dialog.
-
-The **Split Document by Headings** option will open a dialog that allows you to split the selected
-document into multiple new documents based on the headings it contains. You can select at which
-heading level the split is to be performed from the dropdown box. The list box will preview which
-headings will be split into new documents.
-
-You are given the option to create a folder for these new documents, and whether or not to create a
-hierarchy of documents. That is, put sections under scenes, and scenes under chapters.
-
-The source document **is not** deleted in the process, but you have the option to let the tool move
-the source document to the :guilabel:`Trash` folder.
-
-
-Merging Documents
-^^^^^^^^^^^^^^^^^
-
-.. figure:: images/fig_project_merge_tool.png
-
-   The **Merge Documents** dialog.
-
-You have two options for merging documents that are child elements of another document. You can
-either **Merge Child Items into Self** and **Merge Child Items into New**. The first option will
-pull all content of child items and merge them into the parent document, while the second option
-will create a new document in the process.
-
-When merging documents in a folder, you only have the latter process is possible, so only the
-choice **Merge Documents in Folder** is available.
-
-In either case, the **Merge Documents** dialog will let you exclude documents you don't want to
-include, and it also lets you reorder them if you wish.
-
-
 .. _a_ui_tree_status:
 
 Document Importance and Status