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Photoshop is available for Windows and Macs. If you are a Windows user, you can run Photoshop using the regular Windows installer. If you have a Mac, you can find the OS X version of Photoshop at the Apple Store. If you’re not sure which version to use, go to www.adobe.com/photoshop for the download options. Discovering Photoshop Basics Photoshop is designed to make it easy for users who are first learning to work with images. Beginners really only need to have an inkling of what they want to accomplish, such as giving an image a different look by adding special effects or manipulating it in size or color. Photoshop enables you to do so using a number of techniques. Understanding the purpose of each tool is key to using Photoshop effectively. The next sections explore the tools of Photoshop to help you understand the purpose of each tool. The toolbars At the top of Photoshop is the standard workspace, which contains the tools used to create, edit, and manipulate images in this image-editing application. The Toolbar is the contents of the workspace and has access to all the tools and functions in the image-editing program. The Toolbar has a maximum of six buttons, as shown in Figure 3-1, and if you don’t have enough room, some of the buttons may be hidden. FIGURE 3-1: The six buttons that can be accessed at the top of the Photoshop workspace. The first button on the top row, labelled Layer, enables you to create a new layer and manage the layers in an image. The second button, the Layers palette, enables you to manage all the layers in an image. The third button is the Open dialog box, which enables you to manage the files that you open in Photoshop. The fourth button, Grid, enables you to manage the grid and guides (which are shown as solid black lines in an image) that you use to alter the size, crop, and position of the image. The fifth button is the Zoom tool, which enables you to zoom in and out the image. The bottom row of the toolbar is reserved for the tools and functions that you use to alter the appearance of an image. You can adjust the overall look of the image by changing its color and brightness, or by using some of the tools that alter the look of parts of the image. You can also change the appearance of the image by adding effects or using tools such as filters,

Q: Syntax error in Django ModelForm? I have a simple UserModel: from django.db import models class User(models.Model): username = models.CharField(max_length=50) email = models.CharField(max_length=50) password = models.CharField(max_length=50) is_superuser = models.BooleanField(default=False) I created a ModelForm named UserForm. My question is: Why does this create an error: superuser = forms.ModelChoiceField(queryset=User.objects.filter(is_superuser=True), label=”Must be Superuser”) Here’s the error message: Traceback (most recent call last): File “C:\Users\TeamA\Desktop\TeamA -Tower\Cyber Base\Tower Project\offices\TowerProjectOffices\models.py”, line 10, in superuser = forms.ModelChoiceField(queryset=User.objects.filter(is_superuser=True), label=”Must be Superuser”) File “C:\Users\TeamA\Desktop\TeamA -Tower\Cyber Base\Tower Project\offices\TowerProjectOffices\forms.py”, line 20, in ModelChoiceField widget = forms.ChoiceWidget(choices) File “C:\Users\TeamA\Desktop\TeamA -Tower\Cyber Base\Tower Project\offices\TowerProjectOffices\forms.py”, line 18, in ChoiceWidget widget = widget(query_fld=query_fld) File “C:\Users\TeamA\Desktop\TeamA -Tower\Cyber Base\Tower Project\offices\TowerProjectOffices\forms.py”, line 18, in ChoiceWidget widget = widget(query_fld=query_fld) File “C:\Users\TeamA\Desktop\TeamA -Tower\Cyber Base

Q: Is there a mathematical formula for the velocity of particles in a specific path? I’m sorry if I’m asking a trivial question. If there is a velocity constant path like the gravitational acceleration, is there any mathematical formula to define the velocity in terms of position? For instance, if you know the position at t=0 and t=t, you can find the velocity. A: You can define a path as a function $\mathbf{P}(t)=\mathbf{P}_0+\mathbf{v}\cdot t$, if it has no torsion (i.e. acceleration is zero) and so it is a curve in the plane then it is a graph of a function, and then the motion of a particle in this specific path will be given by $\mathbf{v}(t) = \frac{d}{dt} \mathbf{P}(t)$ Treatment of acne with retinoids alone is inferior to treatment with retinoids and isotretinoin in patients with acne type lesions. The efficacy of the retinoid isotretinoin (Isotrex) alone was compared with the efficacy of the combination of isotretinoin and tretinoin in the treatment of three dosages of isotretinoin. In a randomized, prospective study, isotretinoin was given in a fixed dosage of 0.5 mg/kg body weight/day, and 0.5, 1.0, or 1.5 mg/kg body weight/day of tretinoin was given orally to patients, until a minimum of two comedogenic cysts had healed. Cystic comedone formation after 4 weeks of treatment was determined by measuring comedogenic cyst diameter and by photographic assessment. At week 4 a significantly higher percentage of patients had cleared or had a significant reduction in comedogenic cysts on their face compared with week 2 in the isotretinoin-treated group.Q: How to notify all the child components of state change in React I have a parent component which holds a state, for some reason when the state of the parent component is changed I want the child components to be updated. I want to do this through events, so whenever the parent state changes I will do some updates on the component which will update the components which are rendered below it. I tried to do this with Redux, but not seeing any