I am using pyqtgraph and trying to use a histogramLUTable inside of a viewbox to try and plot some data and I have this black box with a little A that is obstructing the graph origin/axis in the lower left hand corner and I can't seem to find what it is named and/or how to get rid of it. I attached a picture with a little red box around what I am talking about.

The image in question with little red box circling what I am referring to:  

There is also a little black box on the lower right hadn side obfuscating the x axis but doesn't go into the level adjustment on the right hand side.

image showing issue with first code written :  

[![image showing issue with first code written ](https://i.stack.imgur.com/yJJTF.jpg)](https://i.stack.imgur.com/yJJTF.jpg)

For reference, my code so far:

```
import PyQt5
from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
import pandas as pd
import pyqtgraph as pg

up = np.linspace(0,1,100)
down = np.flip(up)
nparray = np.hstack([up, down])
data = np.vstack([[nparray], [nparray],[nparray]])
data = np.transpose(data)

app = QtGui.QApplication([]) 
win = pg.GraphicsLayoutWidget(show=True, title="pyqtGraph attempt", size=[800,600]) 

view = pg.PlotItem() 
win.addItem(view)
img = pg.ImageItem(data, border='w') 
histogram = pg.HistogramLUTItem()  
histogram.setImageItem(img) 
win.addItem(histogram) 

if __name__ == '__main__':
    pg.mkQApp().exec_()

```

EDIT (again):
I took a different approach to try and mitigate the little black box by using a plotItem and Viewbox rather than the HistogramLUTable but when I go this route I get the same issue. Originally I said this gives me another black box in the lower right hand corner but if you look at my original screen shot the black box is there originally as well.

```
import PyQt5
from pyqtgraph.Qt import QtGui, QtCore
import numpy as np
import pandas as pd
import pyqtgraph as pg

up = np.linspace(0,1,100)
down = np.flip(up)
nparray = np.hstack([up, down])
data = np.vstack([[nparray], [nparray],[nparray]])

app = QtGui.QApplication([]) 
win = pg.GraphicsLayoutWidget(show=True, title="pyqtGraph attempt", size=[800,600])  
view = pg.PlotItem() 
view.hideButtons()
win.addItem(view) 
img = pg.ImageItem() 
view.addItem(img)
img.setImage(data)

if __name__ == '__main__':
    pg.mkQApp().exec_()  

```

image showing issue with second code written:  

[![image showing issue with second code written](https://i.stack.imgur.com/ioigU.png)](https://i.stack.imgur.com/ioigU.png)