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# UI & Usability Changes¶

## MantidPlot¶

• MantidPlot’s pyplot API has been removed.

### Improvements¶

• Added functionality to sort based on Memory Size of the workspace

### Bugfixes¶

• A bug in the load dialog where bad filename input would cause the last file to be loaded has been fixed.

• Fix crash when starting the Mantid VSI on MacOS.

## SliceViewer¶

### Improvements¶

• A peaks workspace can now be overlaid on the slice viewer when the non-orthogonal view is displayed.

## DGS Planner¶

### New¶

• DGSPlanner has an option to load the UB matrix from the Nexus file metadata

## Instrument View¶

### Improvements¶

The Instrument View visualization tool in Mantid has undergone some major changes under-the-hood which has resulted in a smoother, more responsive interface. Instruments generally load faster as well. Below are a few noteworthy improvements to load times (as tested on Windows 10):

Instrument

Speedup

WISH

5x

BASIS

5x

GEM

4x

SANS2D

3x

POLARIS

3x

CNCS

2x

Release 3.13.0