The default maximum plot size in Surfer is 120". You cannot create a map larger than 120" by default. You can increase the maximum plot (map) size to any number up to 2000".
To do this, follow these instructions:
- Click File | Defaults.
- In the Settings field, expand Miscellaneous.
- Select PlotSize.
- Enter the new maximum plot size in the Setting value field.
- Select a Setting Persistence value (use Always reset to always keep this plot size).
- Click OK.
- Click Yes to save the changes to the surfer.set file.
- Restart Surfer.
Updated October, 2020