// 7. About the operation details of this editor //

// 7-7. Initialize and delete the map data //

By pressing the command button "Initialize" on the upper right of the window or pressing the [J] key, you can initialize the map data and delete other data.

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Slightly different from "7-6-3. Resize map and initialize" mentioned above, it's possible to initialize map data without changing the map size, and also possible to initialize only one of maps 1 or 2 in this command.
In addition to initializing map data, use this item to delete "copy data" and "Undo data (its detail will be described later)".

The blue letters displayed to the right of the buttons indicate the key assignments for each command.
(Mainly assigned to [Z] to [M] on the bottom of the main keyboard.)
Press the "Abort" button or the [Enter] key to abort this operation and return to the edit screen.

// 7-7-1. Initialize map data //

There are 3 types of map data initialization process in the "Initialize or erase data" command, and literally initialization process such as "[1] only", "[2] only", and "Both [1] + [2]" can be done.

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In addition to map data, index information and map names are also initialized and will be erased.

// 7-7-2. Erase copy data //

If you select "Erase copy data", you can erase the currently obtained copy data.

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Incidentally, only one pattern of copy data can be obtained at any time, and when new copy data is obtained, the previous data will be overwritten and be lost, so there may be little opportunity to use this command, I guess.

// 7-7-3. Erase Undo data //

If you select "Erase Undo data", you can erase the currently retained Undo data.

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This "Undo data" is a temporary backup data which will be used for the "undo" operation to restore data and each states immediately before the processing.
And this Undo data will be created each time the following operations are performed.

Immediately after the above operation, the "Undo" button appears in the left half area of the "CLOSE" button at the bottom right of the window.

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If you want to undo the above process for reasons such as "I made a mistake" or "I still don't like it" etc., please press this "Undo" button to restore to the previous condition.
(You can also undo by pressing the [9] key on the main keyboard.)

Incidentally, this Undo data will be also erased by chip placement operation by the [X] key on the normal edit operation, or save operation of the map data.
(It won't create Undo data for chip placement operation)
Also, if you perform a new operation like the one described above (a case that the map data will change significantly by it), the previous Undo data will be overwritten with new Undo data and the previous Undo data will be erased.
(Similar to copy data, the number of Undo data that can be retained is always only one.)

The data and environment to be restored by Undo data are as follows.