Pruning a deck easily

When I make a deck, I usually pick a color and a theme, and then add cards to the deck. But I mean I throw a TON of cards in, like way too many. From there I look at the cards, and remove some. Look at the mana curve and remove more. Then I look more, and remove, remove, remove until I have the deck I want.

But in Deckbox, how do I look at the card images easily and quickly? If I hover on the name, it takes way too long for the image to load. If I look at the spoiler view, there is no option to remove a card in that view. What am I missing?