* Open the Sheet Set Manager:
* Access the Sheet Set Manager from the 'View' tab on the ribbon or type SHEETSET in the command line.
* Navigate to the Desired Project:
* Ensure that the current project (sheet set) is selected in the Sheet Set Manager.
* Import a New Layout:
* Right-click on the sheet set or the appropriate subset (group) where you want to add the new sheet.
* Select Import Layout as Sheet from the context menu.
* Select the Source Drawing:
* In the 'Select Drawing' dialog, navigate to the project drawing that contains the layout you want to import.
* Select the layout(s) you wish to import and click Open.
* Confirm the Import:
* The imported layout(s) will now appear in the sheet set, retaining the original layout settings.
References:
* AutoCAD Documentation on the Sheet Set Manager: Sheet Set Manager

Explanation:
rotate is a command that rotates selected objects around a base point to an absolute angle. You can specify the base point and the rotation angle by entering values or selecting points. You can also use the reference option to align objects with other objects.
* 1- Start the Rotate command, select the square, and press Enter
* 4- Specify the base point
* 5- Select the Reference option
* 3- Select the lower left corner and the lower right corner as the first and second points of the reference angle
* 2- Enter a value of 0 for the new angle and press Enter

Identify the Data Link: Select the table cell that shows the chain link with a padlock icon. This indicates it is linked to an external data source.
Locate the Data Link: Right-click the table and choose Data Links. Note the file path of the linked data file.
Open the Data Link File: Open the linked data file (e.g., an Excel spreadsheet) in its respective application.
Edit the Cell: Make the necessary changes to the cell in the external data file and save the changes.
Update in AutoCAD: Return to AutoCAD and the table should automatically update to reflect the changes made in the external file.
References:
* AutoCAD Help Documentation on Data Linking in Tables

Explanation:
Box 1 = annotative
an annotative dimension style is a dimension style that automatically adjusts the size of dimensions based on the viewport scale. An annotative dimension style has an icon next to its name in the Dimension Style Manager dialog box. The dimension style is annotative because the dimension text height is the same for both viewports in the layout, even though they have different viewport scales1.
Box 2 = associativeThe DIMASSOC is at its default value of 2, therefore the dimensions are associative because they are linked to and update with the measured geometry3.