How to extend this gable

[MatthewJL]

Can someone show me how to extend the bottom right (blue image) gable to match the print?

[Renerabbitt]

6 hours ago, MatthewJL said:

gable to match the print?

Pretty difficult to do considering the right elevation is drawn incorrectly

1. Extend the roof til it clips itself and auto trims at the garage ridge
2. Use the Copy/Paste tool and in the sub-edit menu use reflect about to reflect your copy about the ridge 
3. The ridge to reflect about

1. Move the edge to be in line with adjacent roof plane
2. select the edge of the adjacent roof plan and use the join roof plane tool and highlight the ridge to get it to auto-connect
3. delete this roof plane