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Open Preferences

Oxygen XML Developer lets you control how files are opened. To configure the options for opening documents, open the Preferences dialog box (Options > Preferences) and go to Editor > Open.

The following options are available:
Open each document in a tab next to the current one
When selected (default), each new document is opened in a tab next to the currently open tab. If not selected, each new document is opened in a tab at the end of the current tab stack.
Restore cursor position
Selected by default, it ensures that the last position of the cursor will be remembered when a document is re-opened. If this option is not selected, the cursor will always be positioned at the beginning of the document.
Lock local resources
When this option is selected and you open a file from the local file system or a shared network drive, Oxygen XML Developer locks the file for the current user and the file becomes read-only for other users while the lock exists. Locked and read-only files have a lock icon () displayed on their editor tabs. Newly created files are locked when you first save them. If you select this option with files already opened in Oxygen XML Developer, it will lock all the currently open files. If you deselect this option with files already opened, it will unlock them by deleting the corresponding .lock files. When you try to save locked (read-only) files, a Save As dialog box will be displayed to avoid overwriting the initial resource.
Support for Special Characters section
Note: The options in this section only affect the Text editing mode.
When bidirectional text, Asian languages, or other special characters are detected
You can choose how you want Oxygen XML Developer to handle bidirectional text, Asian languages, or other special characters when they are detected in Text mode. You can choose one of the following:
Disable special characters support for documents larger than (characters)
Enabling bidirectional text editing support can affect performance on large files. When this option is selected, bidirectional editing is disabled for files exceeding the specified size (even if the Enable support for special characters option is selected). The default limit is 300 MB. You can change it to 500 MB or 800 MB, but it is recommended that you always leave this option selected regardless of the limit that is set.
Performance section
Optimize loading in the Text edit mode for files over (MB)

File loading is optimized for reduced memory usage for any file whose size is larger than the value specified in this drop-down list. This is useful for editing large files, but there are several restrictions for memory-intensive operations.

Show warning when loading large documents
Oxygen XML Developer will warn you if you open a file that is bigger than the specified size.
Optimize loading for documents with lines longer than (Characters)

Line wrap is automatically performed for documents that contain lines that exceed the length specified in this text field. For a list of the restrictions applied to a document with long lines, see Editing Documents with Long Lines.

Show warning when loading documents with long lines
When selected, Oxygen XML Developerwill warn you when you open a file with lines longer than the specified length. To reduce the length of lines in a file, format and indent the document after it is opened in the editor panel. For a list of the restrictions applied to a document with long lines, see Documents with Long Lines.