Im focusing on the top view, I check the orthograph is enable but it still have this problem whenever I want to zoom closer. It happen on all view(top, side, front, back)

My mistake. Anyway, heres the first pic where I dont zoom. You can see a green curve lines on image plane accurately.
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Thanks for helping, I tried and it didnt help..Heres an example of what Im trying to say

this pic is when I dont zoom in so it shows my curve lines is in tact to the image plane.

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Hi, when ever I work on nurbs and wanted to zoom in closer, all suddenly the curves line began to move apart from the image plane. How do you lock the camera orientation, when ever I zoom closer and...